I have purchased a Seagate 1Tb external hard drive. Will not connect to imac

Seagate 1TB external hardrive

We're missing a ton of information. How are you connecting it? Is it new (with warranty)? Give us more info.

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LaCie 1TB external hard drive can not connect to E4200

I have my LaCie 1TB external hard drive plugged into the USB-port of the Linksys E4200 so I can access that drive wireless.
However, in my disk management (via Cisco Connect), it does not show under Storage > Disk.
How can I solve this so I can access this hard drive from any computer in the network?
The drive is formatted in NTFS.
Thanks

Connect the hard drive directly to the computer and make sure that your computer can detect the hard drive.
If it is detected and working properly on your computer then connect the hard drive the USB port on the router.
Follow this link to setup storage device connected to E3000 router.

New Seagate 1TB external hard drive is not being selected by MacBook Pro

My new Seagate 1TB external HD is not being identified by the MacBook Pro (10.7.5 Mac OSX). Whereas the same being recognized by a WIN8 OS based PC. I need a format wherby the external HD should be recognised by both Mac OS and Win.
Kindly help.
Pls note my system is being run on safe mode, as there is a problem in the left shif key. Hence, while booting, it is automatically being shifted to the safe mode. I need to format the external HD, so that I can transfer to store my data.

If you want the drive to be able to both read and write on OS X and a Windows machine, you should format the drive as exFAT on the Windows machine. As to why the drive is not recognized when you boot into Safe Mode, that may be because the drive is formatted for another OS and it MAY BE that it's disabled when you run in Safe Mode (which disables a long list of things: see -> http://support.apple.com/kb/HT1564?viewlocale=en_US).
If you format it as exFAT on the Windows machine, you MAY BE able to have it mount on your Mac. No guarantees, though.
Good luck,
Clinton

HT1452 I have a Toshiba Canvio 1TB external hard drive on my Mac. I've used it for 4-5 months with no problems, but now cannot add to it (I use it mostly for photo storage) to it. I can still access information previously added. Ideas?

I have a Toshiba Canvio 1TB external hard drive on my Mac. I've used it for 4-5 months with no problems, but now cannot add to it (I use it mostly for photo storage) to it. I can still access information previously added. Ideas?

I cannot find this 300GB "Backup" in the Finder, only in the Storage info when I check "About This Mac".
You are probably using Time Machine to backup your MacBook Pro, right? Then the additional 300 GB could be local Time Machine snapshots. Time Machine will write the hourly backups to the free space on your hard disk, if the backup drive is temporarily not connected. You do not see these local backups in the Finder, and MacOS will delete them, when you make a regular backup to Time Machine, or when you need the space for other data.
See Pondini's page for more explanation: What are Local Snapshots? http://pondini.org/TM/FAQ.html
I have restarted my computer, but the information remains the same. How do I reclaim the use of the 300GB? Why is it showing up as "Backups" when it used to indicate "Photos"? Are my photos safe on the external drive?
You have tested the library on the external drive, and so your photos are save there.
The local TimeMachine snapshot probably now contains a backup of the moved library. Try, if connecting your Time Machine drive will reduce the size of your local Time Machine snapshots.

My WD 2tb external hard drive will not unmount from my MacBook Pro.

My WD 2tb external hard drive will not unmount from my MacBook Pro. It no longer even shows up in finder, however it does show up in Disk Utility. I have tired so many of the suggestions on the internet all to a fail.
I keep getting the message to be sure that all applications are closed before ejecting the drive. I have no clue how to tell which appliactions are using the external drive to shut them off. I turned off Time Machiene to be safe.
I don't need anything on the external drive, I am just trying to erase it, save my current info, and migrate it to my new MacBook Pro.
I have been about four days now with this issue all over the internet, in this community, and watching videos on everything and nothing about this topic to a fail.
I think I am doomed and have lossed this external drive because of some wierd application that will NEVER close on my hard drive for it to disconnect correctly. It's annoying.
Does anyone have a solution?

Have you trie using another USB port? Can you test the USB ports with other USB devices to assure they are working? You may want to reinstall OS X in case there has been a driver glitch.
Reinstall OS X without erasing the drive
1. Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
2. Reinstall Snow Leopard
If the drive is OK then quit DU and return to the installer. Proceed with reinstalling OS X. Note that the Snow Leopard installer will not erase your drive or disturb your files. After installing a fresh copy of OS X the installer will move your Home folder, third-party applications, support items, and network preferences into the newly installed system.
Download and install Mac OS X 10.6.8 Update Combo v1.1.

My external hard drive will not open and only shows up in Disk Utilities. When I try yo repair it, it give me and error of invalid sibling link. How do I fix my external hard drive?

My external hard drive will not open and only shows up in Disk Utilities. When I try yo repair it, it give me and error of invalid sibling link. How do I fix my external hard drive?

Invalid sibling link may not be fixable by Disk Utility. (Disk Utility is very conservative, and will not attempt repairs that might cause you to lose data.)
It is an indication of serious Directory damage.
that leaves
a) third-party Utilities that will take those risks, or
b) re-initializing the drive (which deletes all your data) and restoring from another backup source.
c) "Copying off whatever files you can salvage" has gone by, and you cannot copy anything off a drive that will not mount. You may be able to use "rescue" programs such as prosoft engineering Data Rescue to copy files to another drive, but that sounds a lot better than its reality. You may get many files, but not get ANY filenames.

I recently updated my Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

I recently updated my 20-inch, Mid 2007 iMac with the latest OS 10.8.5 now my external hard drives will not show up. They show up when I boot them up on a machine running and earlier OS. Is there a fix for this?

Can you see them in Disk Utility?
If so, can you select and Mount them?
If not, disconnect them, reset the iMac's SMC and then reconnect them.
Intel-based Macs: Resetting the System Management Controller (SMC)
1. Shut down the computer.
2. Unplug the computer's power cord.
3. Wait fifteen seconds.
4. Attach the computer's power cord.
5. Wait five seconds, then press the power button to turn on the computer.
If you still can not see them, connect them back up to the iMac running the older OS, open Disk Utility and look to see how they are partitioned and formatted.

WD 1TB external Hard Drive passport not available...

I have a WD 1TB external hard drive and when i plug in the device into my mac book pro it appears as if it is connected but the passport does not display anywhere on my computer. When i try to eject the WD it goes away for a second and comes back up that it is still connected. I do know i have zero space on my external hard dive but i just don't understand how early today it was working and now it can't be found.
Since i have used my external hard dive as my main source for time machine...will i still be able to retrieve my documents, pictures and videos if my hard drive is corrupt? has anyone had this problem before? If so, any suggestions? Thank you!

Unfortuanately WD external HD's have a pretty bad reputation with Macs. It has something to do with their enclosures as their internal HD's seem to work just fine. I would recommend exchanging that drive for one with a higher quality enclose. Just about any other manufacturer would be fine however the 3 best IMHO are:
OWC Mercury Elite Pro series
Lacie Quadra d2 series
G-Tech G-Drive series
All have similar features and build quality. I would be comfortable using any of the three but I've been successfully been using the Lacie's for 3+ years.
Roger

External Hard Drive Will Not Work

I purchased the recommended 1TB WD hard drive. It worked for a couple of days, recorded some programs-- all of which froze after a few minutes, and now my DVR repeatedly shuts down and reboots when the external drive is plugged in. Here's the message I get:
the set-top box will reset because an external hard drive was improperly disconnected
The only way I have disconnected the drive is by going into settings and clicking on "EJECT" as recommended.
Would someone please tell me what is going on here? Thanks.

Prof_Ahab wrote:
I purchased the recommended 1TB WD hard drive. It worked for a couple of days, recorded some programs-- all of which froze after a few minutes, and now my DVR repeatedly shuts down and reboots when the external drive is plugged in. Here's the message I get:
the set-top box will reset because an external hard drive was improperly disconnected
The only way I have disconnected the drive is by going into settings and clicking on "EJECT" as recommended.
Would someone please tell me what is going on here? Thanks.
Sorry to hear about the troubles you are having with the drive. One thing you can do to try to correct the drive issue is to hold down the power button on the drive. You will get a pop up message that an unknown storage device has been found. Click to accept the new device. The drive should now be connected. Go to the main menu of the DVR box and select the option for DVR. Go to expanded storage and format the drive. Let us know if further assistance is needed.
Anthony_VZ
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External hard Drive will not mount via firewire tpo my Powerbook G4

I have a Powerbook G4 1.5, 2 Gb Ram and an 80 Gb Hard Drive. Well my problem is, I went and purchased a Western Digital External Hard Drive. The box states that this hard drive is compatible for both Windows and Mac. But for some reason I can't get the external hard drive to mount via the firewire. However it will mount by using the USB.
So can someone please provide some troubleshooting tips on how I can get this external hard drive to mount?
Thanks

hi there,
in your case, your drive is probably bad because the copy was interrupted. your hard drive may be finished, but more likely, just the file structure is damaged and/or you have bad sectors.
you have a few options:
*if you don't need the data back:*
• see if the drive appears in disk utility and try to erase/reformat (make sure to zero out data to avoid bad sectors)
• if it doesn't appear, try a pc. it won't recognize it, but it may allow you to reformat/initialize it. then, connect back into mac (which will recognize a pc formatted drive) and reformat as mac os x extended (journaled).
*if you need the data back:*
• try a program like data rescue II, file salvage, or boomerang data recovery first to recover the data
• see if the drive appears in disk utility and try to repair disk
• if that doesn't work, try disk warrior and/or drive genius
• if you aren't successful, you may want to try a professional data recovery service (or me first, to ensure that you actually need someone as high tech as drive savers)
• if you are successful and are able to recover the data, then erase the drive (zero out data) and then move the data back, to ensure you're working off a well formatted drive.
fyi, if your computer freezes in the future, be sure to try appleoptionesc first and force quitting the problem application. if that doesn't work, try controloption+appleeject (shutdown) and/or optionappleeject (restart). if those doesn't work, in this situation, the next best move would probably have been turning off the power on the hard drive. if that doesn't unfreeze the system in a few minutes, then hold the power button.
hope this helps,
brian
corewerkz/briancometa.com/

LACIE external hard drive will not mount

I had this problem with Tiger too. I have to turn the LaCie external hard drive on and off 4 or 5 times before it appears on my desktop. This shouldn't be right! Can I do something about this???

Another Lacie issue (lacie 250 d2) . Similar the others. WHen I installed leopard it asked if this was the drive to use etc and i said yes. Since then it wont work. All attempts to back up have failed. I cant reformat either. Just get beachball when ever I try anything with the disk. Only way to do anything is to remove the FW connection. Tried the drive on another G4 (tiger) and it scanned and reported "disk seems ok" but then any attempt to write to the drive or any other activity is greeted with beachball.'
Rang the distributor and was told " we are having some issues with lacie and we are losing confidence ... would you like to buy a western digital" !!!

External Hard Drive will not mount after upgrading to Yosemite

After upgrading to Yosemite, my external 3TB hard drive will not mount... can't see in Finder, but does appear in Disk Utility. Follow steps to Repair disk, but get a message that D.U. cannot repair disk.

See mount section.
Disk Unmount Using Terminal
Disk Utility – Force Mount Disk

External hard drive will not eject

Since upgrading to ML my small "my passport" hard drive will not eject. First it gives me the message "the disk couldnt be ejected because Safari is using it and to close Safari and try again". (not sure why safari would be using it..) When I close safari then I get the message " the disk couldnt be eject because another program is using it"
My only option is to force eject each time.
Any suggestions?
Thanks
Susan
Mid 2011 15" macbook pro

Have you updated your "My Passport" software lately, there have been recent updates for Mountain Lion issues: http://community.wdc.com/t5/News-Announcements/bd-p/Announcements
http://community.wdc.com/t5/News-Announcements/Software-Update-WD-SmartWare-Upda te-1-3-4-x-for-Mac-Users-7-26/td-p/444122

My Lacie external hard drive will not back up on Time Machine. Says there's not enough space. This has happened with every single external I've purchased. Thought TM was supposed to delete old backups??

My Lacie External backed up on Time Machine after the first back up but now says there's not enough room. I thought TM deleted old back ups to save new versions. What am I doing wrong. This happens to me constantly. Every single external hard drive I've purchased for the MacBook Pro (5 of them) has not worked either initially or at the second back up. It either isn't formatted properly so I have to go to Genius bar to help me set up for the first back up, or after the first back up, it says there's not enough space and I have to go back to Genius Bar. Is there a way I can fix this on my own?

I just purchased 2 external hardrives. a LaCie Minimus and a G Drive. Each 1 TB. The guy at Apple told me that would provide 2 good TM backups for me. My internal HD has 750 GB capacity, of which I'm using 700 GB. Perhaps the ratio is not great enough. I do wish they would have told me this before I purchased the two Bummmmer! I even had them format and get the first back-ups going because of issues I've had in the past. I also just bought a 750 GB for photos.
So, I won't be able to buy another bigger external since I've just purchased 3. Ugh. Well, I'll just exclude some files and divide things up. Eventually, I just want my 20,000 iphotos on one of the 1TB externals, and a TM back-up on another so that iphoto will function once more. It really hates how many photos I have and is brutally punishing me for it.I seriously need to do some housecleaning!
Thanks for the advice. Just moved from US to Australia last week and was hoping to upload a few photos and the domino effect has lead me to this. Just went to Genius Bar in Perth today and they told me how to reformat drive to transfer iphoto library over, but I got stuck at trying to back-up my TM.

Can i delete my photos and videos from my mac if they have been exported to an external hard drive will they still be saved if I delete them off the computer but are backed on time machine? Can u explain time machine plz?

I am doing this because I have run out of space on my internal hard drive as I have over 100 GB of memory in pics.
I think I am misunderstanding how time machine works/how it backs things up. Can someone please explain it to me? Thanks and I appreciate it! :)

Rick,
For everything you should know about Time Machine, see http://pondini.org/TM/FAQ.html.
If your photos were on your internal drive then, yes, they are likely to have been backed up by Time Machine.
However, if Time Machine starts running out of space, it will delete old back ups and thus your photos aren't really 'safe' just on a Time Machine back up. What you really need to do is either:
Buy another external hard drive for storing your photos and other files, or;
Back up your photos to DVD's: there are a number of cataloging apps that you can use to catalog your files or, if you have named them something specific, use something like DiskTracker.
Either way, don't rely on your Time Machine back-up to store your photos.
Good luck - call back if you need more information,
Clinton

I have purchased a Seagate 1Tb external hard drive. Will not connect to imac

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