USB Thumb Drive won't appear or mount on Desktop

I'm preparing to upgrade to Mavericks, and before I do, I want to make a bootable drive on a PNY USP 2.0 FD Media thumb drive. When I insert the thumb drive into a USB port, it doesn't mount. It doesn't appear on the desktop. The drive is listed in Disk Utility, but Verify, Mount, and other First Aid options are greyed out. I can only unmount the drive from Disk Utilities. I've checked the Finder preferences, and External Disks is checked under "Show these items on the desktop". I'm not sure if I've used this thumb drive before or not. I was trying to check this disk before I created a bootable disk. I might have already done this shortly after I purchased my iMac, but I'm not sure. Other USB drives mount fine, and show all of their contents. I'm using an iMac currently running OS X 10.8.5. I'd appreciate any hints on what might be going on here. Thanks!

Pretty much sounds like the USB Drive is karput. Buy another one.
Cheers
Pete

Similar Messages

Thumb drive won't appear on desktop.

On my iBookG4 running 10.4.11, my thumb drive won't appear on the desktop when I insert it in the USB port. How do I make it appear? This just happened, as yesterday, it appeared. Help!

Those drives commonly come formatted for use with a PC. DU can't repair that format. Do you know what format yours has? You can try to erase/reformat it. If it Mac formatted right now and can't repair it then that may indicate the drive is truly history.

USB Hard Drives Won't Appear in Win 7 (Boot Camp)

[2.7 Ghz Core i7 Macbook Pro 15" running 10.8.5]
I have a 512 GB SSD that I run with a Boot Camp partition. I recently had to reformat the drive because I used a third-party app to resize my Boot Camp partition and it ceased to appear in Finder (though it booted just fine by itself). After formatting the drive, recovering my OSX install via Time Machine, running the Boot Camp Assistant to create a new Boot Camp partition, installing Win 7, and running the Boot Camp setup.exe on the Windows side, I find that USB drives will not appear in Windows Explorer. I hear the "USB chime" when I plug/unplug drives, but drives never shows up. The same USB drives show up just fine in the OSX Finder.
I suspect it's a driver issue because when I first plugged the drive in under Windows I got a message about "Intel USB 3.0 Root Hub" and it was searching for a driver that it never found. However, I ran the Boot Camp setup.exe again, and tried updating the driver in Windows Device Manager. No dice.
This puts me in a spot, because my backup of my previous Boot Camp partition is on an external USB drive (via EaseUS), and when I boot from the EaseUS Recovery CD the USB drive doesn't show up in order to allow me to select the backup file I want to restore. (I would have used Winclone, but my partition was not mountable in OSX at the time due to the corruption. *sigh*)
I could probably live without backing up my previous Windows install since nothing on it is irreplaceable, but I definitely cannot live without being able to plug in a USB drive. What am I missing here?
Thanks!

if your question is how to get windows to work with apple filesystem
http://forums.macrumors.com/showthread.php?t=1088460

Help. My WD Time Machine Drive won't appear anymore on the desktop. It won't appear on my windows OS machine as well. Can anyone help me?

I made the darnest mistake when I tried cleaning up my time machine drive by deleting some of the "back-up" restore points.
Since then, the external drive does not appear anymore on my mac's desktop. Nor does it appear on my windows OS laptop.
I tried using DISK UTILITY on my Mac and the drive appears there. I was able to run Repair Disk, though No Errors appear. I "cannot eject" using the EJECT button at the top of the application as it prompts me with a message
"EJECT FAILED --
The disk “WD Ext HDD 1021 Media” could not be unmounted.
Make sure that all applications and files are closed on this disk."
Same goes when I try using a WINDOWS OS machine. It does not appear on Windows Explorer. Though when it does appear in the "eject list".
I assume that deleting some of the restore points (at random) was the cause of this.
How can I repair it? I have some sentimental and personal files (i.e. family pictures) that are also stored on the drive.
Thanks in advance.

Other than the Disk Repair from the Disk Utility, I would suggest resetting the PRAM: http://support.apple.com/kb/PH11243.
Tha's kind of a last ditch effort though. Can you put it in another mac computer with the mac os? Does it show up there?

Iomega USB Hard Drive won't appear on my desktop. Please help

Hi, I purchased an Iomega desktop hardrive about 3 months ago and all has been working well.
I had no problems working it with my MacBook Pro and backed up all my files easily. I now need to get some files from my Iomega hard drive, but now when I switch it on nothing appears on the desktop.
I have restarted my Mac and the hard drive several times and still nothing. I even tried using the USB cable that came with my printer in case the cable was faulty, but still nothing.
I have not used the Iomega hard drive for over a month, so am not sure if this may have something to do with it?
Can anyone help me?
Thanks in advance

OK… does the drive appear in Disk Utility else System Profiler? Also, if you are using bus power to run the drive try plugging it into AC. Another possilbility is to place a powered USB hub inbetween the drive and yur MBP as sometime this helps.

USB thumb drive mounting issues in Lion?

Hi all,
I just installed Lion on my mid-2010 13" MacBook Pro a couple of days ago. All seemed to be going great until I tried to use my USB thumb drives. I have four of these (3 Sandisk and 1 Imation), and none will mount. When I go into Disk Utility I can see them, but when I try to mount them manually the response is "Mount Failed" and some text regarding running Disk First Aid. However, even when I repair the volume, it still won't mount. This happens with all four drives, and I used them all without incident a few days ago when I still had Snow Leopard installed. They are all formatted for FAT32. I've seen a few scattered messages about USB and NTFS mounting issues, but it appears to be an isolated problem. Anybody else having this issue? If so, are there any workarounds? I'd hate to have to revert back to Snow Leopard just to use my thumb drives.

Try to use the disk utility an format one of your Thumb Drive, and see if it can mount.

Problems mounting USB thumb drives and transferring files

My iMac 24" (10.5.4) won't recognize a USB thumb drive (even if plugged directly into computer, not hub) unless I restart. Then when I try to transfer large number of files back or forth from thumb drive, it won't complete the transfer, gets hung up.
None of these problems with my Intel MacBook (also 10.5.4).

You might try reformatting the usb drive using Disk Utility. Use MacOS Extended(Journaled). That might help.
lenn

USB Thumb Drive Not Mounting With Mavericks

I have several Thumb drives (FAT32) that no longer mount on my iMac running Mavericks.
The thumb drives do not show up in finder nor do they show up in disc utilities.
The USB bus still seems to work since other USB devices seem to connect to it, but none
of the thumb drives do. I have done an SMC and PRAM reset with no luck. I do not have
TUXERA nor NTFS-3G so nothing their to disable.
I do have a Mac Mini running Mountain Lion and all thumb drives do work with that.
Out of ideas here.

But given that other USB devices work here — what sorts of other USB devices?
I have 2 external hard drives that work on the very same USB port and an external blu-ray drive as well.
Are there any add-on anti-virus or anti-malware "tools" installed?
None. Never have.
To check the USB bus, remove all hubs and all other external USB devices from this Mac, reboot, connect one of the thumb drives directly to the Mac, and try again.
Everything re-connected except for the thumb drives. External hard drive and Blu-ray drives popped right up but no USB flash drives.
Try a different and newly-created login, and see if the flash drives work there.
I used the Guest login and the same thing, everything works except the Thumb drives.
To check the local OS X installation, see if booting this Mac from the recovery partition (if one is present)
None is present.
or booted from another (external) OS X disk allows access to the thumb drives.
I have en extern HD that is blank, but I do not know how to install Mavericks on it then run it.
Is there anything in common among these failing USB disks? Same brand and model? Or a mixture of different thumb drives?
They are all FAT32, other than that no I have Cruzer, Kingston and PNY brands. 2GB 4GB and 16GB.
Are the OS X systems involved both similar configurations, or are they very different versions?
Mac Mini is Mountain Lion and has no issues with the thumb drive.
Intel iMac is Mavericks and my Mac Book Pro is Mavericks. Neither one of them can mount my USB sticks.
Thanks for your complete reply, you had some items that I did not try but unfortunately it did not help yet.

Script to mount/unmount a USB thumb drive

I am looking for an applescript to mount or unmount a USB thumb drive.
I tried:
tell application "Finder"
do shell script "diskutil mount /dev/disk1"
end tell
This did not work for me

I tested on a USB stick, no probs, I put my USB stick in a slot, waited for it to mount, ran the script using the "unmount first", then ran the "mount" second worked fine after that using the "unmount " part of the script, I found though that if I right clicked "eject" that the script would not mount the volume.
You could try something as simple as the below maybe.
tell application "Finder"
eject "LEXAR MEDIA"
end tell
set _VolumeName to "LEXAR MEDIA"
set deviceName to do shell script "diskutil list | grep \"" & _VolumeName & "\" | awk '{print $6}'"
--do shell script "diskutil mountDisk /dev/" & deviceName --mount
do shell script "diskutil unmountDisk /dev/" & deviceName --unmount
Budgie

I need a way to get usb thumb-drive securely recognized as a apple keyboard

I posted this question over at Developer Discussions also, just to get more eyes on it, not to be disruptive.
So, I would like to utilize a maximum-length Admin. password (255 characters?) without having to manually type it in each time I login, install/update software, or for any other reason. The perfect situation would be some type of script or software installation onto a USB pen drive (2 gig sony)which is inserted into the macbook (via usb) when the Leopard Login screen appears. It logs me in, then, afterwards, it creates a clickable icon on the desktop that achieves the same goal (entering a long admin password securely). And all of the above is achieved using the built-in security of Keychain access, without having to continuously mount and unmount the drive.
Searching google produces many expensive products that do not fit: Securikey, omnikey, smart cards, tokends, and on and on. They seem to have figured this out at microsoft - not that it matters much, except that it appears to be possible.
One problem is that a USB thumb drive is not mounted until after login, it seems, but, I plugged in a friend's usb apple keyboard from the year 2000 and was able to type in my password at login. And, an email reply elsewhere suggested writing a daemon (that constantly runs in the background of the operating system) that could recognize the drive and accept a script from it that inputs the password and executes the 'enter' command.
I don't know how to write daemons yet, but I can stumble around a bit with bash and applescripts, and I can copy any Xcode project out of a book and make it run properly. I'm a beginner.
This project might create security issues for my operating system, but I'm really not concerned about that because this is a computer I don't rely on and can safely perform experiments on. And I would like to use this as an opportunity to learn - so I'm going to give it a whirl anyway - unless someone has already accomplished something similar. In that case, why reinvent the wheel and plug it into the wall, eh?
Basically I am asking for help. Any suggestions would be greatly appreciated.

You don't need to get deep into programming to do much of this.
launchd, the background process that's responsible for launching most of the background processes on your machine, has the ability to launch a script based on disk mount events.
StartOnMount <boolean>
This optional key causes the job to be started every time a filesystem is
mounted.
So you could create a LaunchDaemon script that watches for a disk mount. When a disk is inserted your script is fired off. You'd need to perform some verification to ensure the disk is, indeed, your USB stick and not some other device, then it can trigger the rest of the login process. Off hand I'd look to osascript to run an AppleScript-based keystroke, but there may be other ways, too.
One big question relates to securing your password. Clearly you can't store it in the script, so you'd have to read it from somewhere. You also can't store it on the USB stick unless you somehow encrypt it (otherwise someone can just look at the files on the USB stick and get your password), but AppleScript can use the keychain, too, although I'm not sure what keys would be available prior to login, so it requires some experimentation.

External hard drive won't appear on my desktop

I'm trying to run a backup, but my hard drive won't appear on my desktop. I see it in Disk Utility, so I know it's there...
...any suggestions?
Thanks,
kevin

Kevin - There might be a few reasons as to why your external drive won't appear have you tried any of these suggestions:-
STEP ONE - Confirm that the drive is being seen by the system
Click the Apple icon and select About This Mac.
Click More Info.
Select the Drives and Volumes tab.
If the Iomega Hard Disk drive is not listed under the USB/FireWire arrow, proceed to STEP THREE.
If the Hard Disk drive is listed, continue with the next step.
STEP TWO - Format the Hard Disk drive to Mac HFS format
The Iomega Hard Disk drive is factory formatted to FAT32 for maximum compatibility. If you have not reformatted the disk or the disk is formatted to FAT32:
The disk may mount very slowly in OS X if the disk is FAT32 formatted.
Mac OS X will not mount any DOS (FAT32) partition larger than 128GB. For more information, please check the Apple® Web site at http://docs.info.apple.com/article.html?artnum=107483
Warning: Erasing your Hard Disk drive will erase all of the information stored on the disk. If possible, back up your data before erasing the hard drive. Mac formatted disks are not cross compatible with other operating systems, such as Windows®, without the purchase of additional third-party software.
Double-click the Mac hard drive icon.
Double-click the Applications folder.
Double-click the Utilities folder.
Double-click the Disk Utilities icon.
Highlight the drive in the left window.
Click the Erase tab.
Select Mac OS Extended.
Click the Erase button and then click Erase from the confirmation window.
If the Hard Disk drive now mounts, you are ready to use the drive.
If the Hard Disk drive does not mount, continue with the next step.
STEP THREE - Are the Mac OS X drivers detecting the drive properly?
The Iomega Hard Drive may not mount if you are using Mac OS X versions under 10.1.3. If you are not using Mac OS X 10.1.3 or higher, please visit the Apple® Web site at http://www.apple.com/macosx/ for information on getting the latest version.

USB thumb drive shows up twice

Dear all,
I have a 1GB USB thumb drive which always mounts in the finder twice:
i.e.
I am talking about the finder window and the desktop: once I have plugged in the usb stick it then shows two connections to the stick:
one is called:
USBDISKPRO
the other is called:
NO NAME
I just got my G5 and I have partitioned my disk, though I dont think this has any influence on my problem...
the problem is exactly the same as the one mentioned last october (please see here below) in this forum but has not been aswered.
I hope I have more luck.
thank you!
Hynek
USB Thumb Drive shows up twice
Posted: Oct 11, 2005 10:07 AM
I have a 64MB USB thumb drive (the only name on it I can see is VeriTest, which might be the name of some company that was giving them away) which always mounts on the desktop twice. I have used drive utility to re-format it (but even in drive utility it shows up twice).
On a 10.3 machine yesterday I reformatted it while zeroing out all the data and it only showed up once. But today when plugged back into my 10.4 machine, it shows up twice again.
It also gets weirder... I can look at either "drive" and delete the file that is on there, but it does not get deleted on the second drive - so the two of them seem to get out of sync. I cannot, however, empty the trash because it says the item in the trash is in use.
I know it's just a 64MB little thingy, but I find it quite useful (but this is annoying when I have to reformat to erase a file)... Any ideas?
Ben
G5 Mac OS X (10.4.6)

My guess is that the PC isn't showing you the second partition at all. If a drive is partitioned, the correct behavior is to show it as two separate volumes. If your PC is not showing the second volume, so showing them both as one volume, either way your PC is behaving incorrectly.
Did you install some software on your PC to use your thumb drive? When mine is inserted into a PC, it automatically installs software to manage the secure partition. Maybe yours has some kind of similar software that makes it appear as a single volume.

Prepare an usb thumb drive, to boot windows 7 or 8 in UEFI mode

Purpose of this post:
Prepare an usb thumb drive, to boot windows 7 in UEFI mode and install the system in pure UEFI mode.
Why am I writing this:
I had a hard time finding out how to make a custom installation of windows 7 in pure UEFI mode, and avoid using the factory restore disks. After hours of research, experiments etc I finally got the point and found a solution. And I'm happy to share my research with you. I hope this will be of help. If something is not clear, or more information is needed, I will be glad to explain things further.
History:
As most of you already know, BIOS was developed for PC in early eighties and has remained unchanged in recent years. But, since 2000, Intel started working on a new firmware interface, called Extensible Firmware Interface, abbreviated EFI. And since 2005 United EFI Forum has been handling the responsibility for development, management and promotion of UEFI specifications. Bigger companies like Intel, AMD, Microsoft and Dell have already started to bring out their products in accordance to UEFI standards which has more stable, secure and easier to use interface.
How does UEFI works (in a nutshell):
Once you power on the UEFI based PC, the Pre-EFI is executed which initializes only the CPU, memory and the chipset. This followed by Driver Execution Environment (DEX) where other hardware is initialized.
Advantages of UEFI:
    It can integrate various drivers this will not require to load during booting so saves time.
   PC can connect to network without OS.
   Also integrated drivers allow rendering GUI based control panel which out dates the old school bluish BIOS screen.
   Not all the installed hard drives are scanned as boot drive is set during the installation of OS in UFFI.
   Applications like anti-virus and diagnostic tools can be stored on virtually any non-volatile storage devices attached to a PC.
For a system to boot and install in UEFI the partition table of the HDD should be GPT (GUID Partition Table), not the old school MBR (master boot record). GPT has many advantages, can have virtually an unlimited number of partitions (windows will allow only 128) and impressively big partitions.
Since UEFI has a lot of advantages why not having a system install and boot in UEFI mode? AFAIK new Lenovo notebooks/netbooks are UEFI capable and OS’s are already installed in pure UEFI mode.
So, let’s go now to the point. Do you want to have more control over your HDD? Let say, you have a 320GB HDD and you have divided it in two partitions, one of 50GB, for your Windows 7, and the remaining for your data. If something goes wrong and you need to restore your system to factory default, with the recovery disks, it will wipe your partition scheme, set the system to default and this way your data will be lost.
You may want to make a “vanilla” installation of windows from a USB thumb drive and avoid using factory recovery disks. Now here things get complicated. A standard preparation of the USB with Microsoft’s software (Windows 7 USB/DVD Download Tool), or other tools, will give you a bios installation, not a UEFI one. So for the system to boot, you will need to change some settings in bios, and changing it from UEFI to legacy bios. The installation will prepare the HDD in MBR partition table, and you will lose all the advantages of UEFI, described above.
Now this can be avoided, by properly preparing an USB to boot and install in UEFI mode. Here are the steps:
Step by step tutorial:
1.   In a windows computer, download a legal copy (although trial) of the windows 7 os. You can do this from here: http://www.mydigitallife.info/official-windows-7-sp1-iso-from-digital-river/
Be sure to download the same version that came preinstalled in your computer. For example, if you have a Lenovo x120e, with a Windows 7 professional, 64bit, download an iso image of the Windows 7 professional 64bit.
2.   Once downloaded burn the iso to a USB thumb (at least 4GB) using Windows 7 USB/DVD Download Tool.
3.   After preparing this, create a folder on your computer, name it whatever (i.e. W7pro64bit). Go to the root of your USB
and select all the files and folders there (9 in total) copy, and paste to your folder you created, W7pro64bit.
4.   Using windows format the usb again in FAT32. Windows 7 USB/DVD Download tool, formats it in NTFS. We need a FAT32 formatted disk to achieve our goal. Formating again the USB in FAT32 will not touch the MBR of the USB thumbdrive. And after copying back the files (see step 6) the USB will still be bootable. (nice, and simple, isn't it?)
5.   Now go to the folder W7pro64bit and do the following:
a.   Browse to W7pro64bit\sources\ and open install.wim file. It’s a big file, and can be opened as an archive with 7zip (free software). Do not extract it, do not modify it, just browse the file with 7zip. Just to be sure you do not mess with that file, you can copy it somewhere else in your computer, and than procede.
b.   Browse this file (install.wim) to \1\Windows\Boot\EFI\ and locate the file bootmgfw.efi. Do not move, delete it, but just drag that file to the desktop. (if you have copied the file install.wim to another place in your computer, than you are safely do whatever you want with that file ) Close the 7zip program to release the install.wim file.
c.   Rename the file you just copied to the desktop from bootmgfw.efi to bootx64.efi.
d.   Now go back to w7pro64bit folder and browse \efi\Microsoft. Form there copy the folder boot and paste it one level up, on the folder: \efi. It will look like this: \efi\boot.
e.   Now copy the file you saved on your desktop and renamed (bootx64.efi) to \efi\boot (inside the boot folder you copied on step 5d
6.   Now go to the root of the folder W7pro64bit and select all folders and files (9 in total) copy, and paste all those files back to your USB thumb drive. (see step 4 for more info)
7.   Go to the computer that you are going to reinstall, and before restarting it, use the program ABR (activation backup and restore) to backup the license of your windows os. (use google to find ABR). Advanced Tokens Manager (ATM ) is great too. This link may be of help: Backup and restore W7 activation. After the program finishes its magic, it will create a few files inside the folder where the program itself reside. Copy these files to a new folder in your usb. Rename it to ABR so you will quickly find it later. (if you decide to use ATM, the procedure may be a little different. But you are smart enough to figure out how to use it)
8.   Backup to an external storage all your data before continuing.(reminder: are you sure you saved the license as explained in step 7, to a safe place? To a external drive, to another computer? If you are sure, than go on with step 9)
9.   Now restart your laptop, and enter your bios settings. Go to the boot settings, and set the computer to boot in UEFI only. Not both, not UEFI first, or legacy, BUT UEFI only. Save and restart.
10.   Press f12 (or the corresponding key for your machine) to choose the boot device and chose to start from the USB thumb drive with your windows 7 pro 64 bit.
11.   If everything is done correctly, your computer will boot from the USB.
12.   Follow the wizard and choose a custom install, not upgrade. At the disk partition window delete all the partition you see there until you have only one unallocated space.
13.   Select it, and click next to install windows, without making partition in this point. The installer will create a GPT partition table not a MBR since the USB booted in UEFI mode.
14.   Immediately after the first restart remove your USB thumb, and the installation will continue from the HDD. Wait until installation finishes.
15.   When you will be finally on your desktop, on the installed OS plug your USB go to the ABR folder and click on restore.exe. It will restore your license and your copy of windows will be activated.
16.   Now you can go in computer management/disk management and shrink the HDD to create your partitioning scheme. Make sure to leave enough space to your windows os. (30gb or more for extra programs you will install at your choice)
17.      Download from lenovo.com thinkvantage system update and update your system. Windows update too can install all the necessary drivers, if you need only basic drivers support.
Note: if tvsu will fail to work, see this:
http://forums.lenovo.com/t5/ThinkVantage-Technologies/ThinkVantage-System-Update-Servers-down-the-wh...
It may look a looong tutorial, but once you do this for the first time, it will look a piece of cake.
Final words:
From now on, you can install windows 7 in UEFI mode with your special USB without changing your partition scheme anymore. If you have a data partition beside your os partition (see the example above), when you reinstall the system using your USB thumb drive, at the disk partition window chose the partition where windows is installed, delete it, and reinstall windows to the unformatted area. Your partition with your data will be intact and the installation will automatically mount your data partition to the system. And, all the scope of this procedure, you will always have a pure UEFI installation of the system, with all its benefits.
Have fun!
abvasili
Moderator note: changed subject to match new content. Was: Prepare an usb thumb drive, to boot windows 7 in UEFI mode
I'm just a volunteer. I like to help others where I can. Do my ideas work? I hope so. o_O
Who helped you today? Do not forget to thank him.
My hardware: TP x120e 0596-2ru. Windows 7, sp1, 64Bit, English, installed in UEFI mode.

seanare wrote:
Thank you, as I noted here, your post was the key to my getting a Windows 8 SecureBooting setup on a W530.
In the case of Windows 8, I needed to copy the files away, reformat my USB key as FAT32 and copy the files back, and viola I was able to boot from my USB install media with the BIOS set to only boot UEFI. From there, there rest was easy (for Windows 8, the copying and renaming is not necessary, the key is having a FAT32 partition on the USB media, rather than an NTFS one; the EFI files are already in the right location).
Thank you again good sir.
You are welcome... and I'm happy that the change of the file system helps with windows 8 too. Thanks for confirming that.
abvasili
I'm just a volunteer. I like to help others where I can. Do my ideas work? I hope so. o_O
Who helped you today? Do not forget to thank him.
My hardware: TP x120e 0596-2ru. Windows 7, sp1, 64Bit, English, installed in UEFI mode.

Using a usb thumb drive with a mac

So, I'm a recent windows user and when using a USB thumb drive, if you erased something, it would automatically update the thumb drive and show the right amount of free space.
I've noticed with the mac, if you delete an item, it doesn't update, and you need to go into disk utility and format in order to show the appropriate amount of free space.
Is there an easier way to do this?
I searched for a few minutes on this topic, but couldn't seem to find anything. All apologies if I missed it.

Choose Empty Trash from the Finder menu, or from the menu which appears when you control-click or click and hold on the Trash icon in the Dock.
(38516)

USB thumb drive crashes MBP and PowerBook G4

Hi!
I have a USB thumb drive. It mounts on the Desktop (as two drives, which is not strange because it has both an internal 6 MB of memory and a 2GB SD card) and I can open them. But if I attempt to copy a file either to or from the drive, the Finder hangs forever.
This problem exists both on a shiny new MacBook Pro with 10.4.7, and a PowerBook G4 with 10.3---in either case, I must hard-reboot the machine.
DiskUtility says that the drive checks out OK.
Any thoughts? I tried reformatting the thumb drive, which worked temporarily; but when I added a file to the drive on another machine and tried to transfer it to the Mac, the thing hangs Finder again.
I don't have any problems with the drive on PCs, and I don't have the problem with other USB drives on the Mac.
Xcott

It sounds like the file system is corrupt. I am assuming it's FAT32. I would reformat the drive partitions on a Windows machine and see if that helps.
Also, because it's a dual, you might want to make certain that you do not plug it into a hub or a keyboard but directly into your Mac's USB host port. It may need additional power...
Good Luck!

USB Thumb Drive won't appear or mount on Desktop

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