Is it possible to format an external hard drive on my mac?

I purchased a portable external hard drive to back up my former pc in the hopes of using it on my mac. Obviously, I did not research this seeing now that I can integrate my files and photos from my pc to my mac. It appears possible to format the external hard drive to my mac os, which should be done prior to downloading files from my pc to the hard drive. Has anyone dealt with this or am I the only idiot that purchased the external hard drive thinking that was the thing to do before my pc dies completely?

A HD formatted in EXFAT will transfer data between both PC and Mac.
However dont make the titanic error most do in having merely a single external HD backup of your data, thats a tragedy waiting to happen.
HD are cheap as dirt.
Ideal situation is 3 HD , 1 for Mac backups, 1 for data archives stored away safely and updated as needed / often.
and a 3rd HD in Exfat for data transfers (or a thumb drive for the same thing to save $$)

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How do I format an external hard drive to be Mac OS Extended (Journaled)?

I am in Disc Utilities, but I can't figure out how to format my external drive. It is at 0, ready to go... Just need the steps...
Thanks,
Ham

Hi(Bonjour)!
The following process will erase everything on your external HD and reformat it to Mac OS journaled partition.
1) open disk utilities application.
2) click your external hard drive's name in the left column.
3) select the "erase" tab in right.
4) select "Mac OS X extended journalized" in local menu.
5) click "erase button".
Formatting a 250 Gig hd can take much than one hour...
Michel Boissonneault

How do i format an external hard drive for use on both windows and mac book air?

how do i format an external hard drive for use on both windows pc and mac book air?

Use exFAT on the PC.
(71374)

One Format External Hard Drive for Your Mac and PC...

I have Formatted my External HD Passport 500GB = (465.8) and split it in two partition Mac OS Extended (Journal = 232GB) and FAT32 (Ms-Dos-FAT = 232GB) and reformat to NTFS using Windows...
How to use one External HUD for your Mac and PC you have a PC and how to have two Partition in Mac OS Extended (Journal) and FAT (Ms-Dos-FAT)as you desire the size of your partition under application, Utilities and Disk Utility and covert the (FAT32) to (NTFS)using Windows Control Panel or just search by Start, search Computer Management or just right my Computer and format the second partition to (NTFS)
Tips for Mac OS Extended (Journaled) FAT32 vs NTFS, what works and don't work...
(1)Mac OS Extended (Journaled) Partition can't be use in Windows to transfer files but NTFS Partition can be use in Mac by transferring file from Windows to Mac and NTFS support for files over 4G in size...
(2)FAT32 can be use in Mac and Windows but with a limitation that a file cannot be transferred to a FAT32 partition if the file is larger than 4GB such as a video file and FAT32 file system performs more slowly than NTFS...
(2)Mac OS Extended (Journaled) can be use in Windows when you Reformat your HD to HFS+ by third-party app such as http://www.macdrive.com/ MacDrive for $50.or http://www.paragon-software.com/home/ntfs-mac/ NTFS For Mac 6.0 for $30...
Reference link 1 External Hard Drive for Your Mac and PC...
http://www.myfirstmac.com/index.php/mac/articles/1-external-hard-drive-for-your- mac-and-pc
Best regards...
JamesUFOs...
http://www.youtube.com/user/JamesEBEs

I have many external drives I use between my MacBook Pro and my Windows PC's. I use a free NTFS driver for Mac OS-X to give me full read/write access to any NTFS formatted partitions when running Mac OS. I also use MediaFour's MacDrive v8 on some of my Windows PC's to access any HFS+ formatted partitions.
Most of my drives are formatted NTFS because I have more Windows machines than I have MacDrive licenses, and with the driver for Mac OS, they are fully accessible. I have a few drives I do keep formatted as HFS+ because I have encountered an app or two that don't work quite right when they don't get to write to files on an HFS+ partition (one of my backup programs is picky about this).
As said before, FAT32 is fully accessible between the two OS'es but it also has it's own limitations.

How to format an external hard drive for vista and snow leopard?

I want to format an external hard drive to attach to Airport Extreme base station to us with Snow Leopard and a PC with Vista. What format should I use for read/write access for both?

I use NTFS for my external drives being used on both Macs and Windows. To get the Mac to write to NTFS, you need a separate program. I use Paragon for Mac software. It works behind the scenes. There are also some free things that do the same thing but I found them cranky and unreliable. YMMV.
Windows can not read any of the Mac disk formats without additional software.. FAT32 is fine but is extremely limited.
For the last year, I have had absolutely no problems on any computer, Mac or Windows.

I cannot find the best way to format an external hard drive for MAC, PC, TV?

Hello,
I have a problem: I want to use an external hard drive on my Mac as well as on a PC and a TV. The normal structure of Mac (Journaled) isn't supported by PC/ TV. I changed the structue into DOS(FAT) on my Mac. That's suppoerted by TV and PC. But I'll use the hard drive for storage of HD films so I'm afraid that the structure is not good enough for this (it seems old to me DOS.....) And I don't want the quality to be influenced by a bad structure.
Then I've formatted into NTFS on my PC, but then I cannot put files from Mac on the hard drive.
What is the best solution?
Hope someone can help me!
Regards, Kim

FAT works great, but the problem is that it's old and that you can't store files that are bigger than 4 GB. In this case, you have exFAT, a filesystem compatible with OS X and Windows, but I don't think that the TV will read it.
If you want to use NTFS, you need a third-party application to be able to write in it on OS X, like Paragon NTFS

Is it possible to use an external hard drive for time machine backup and also as a regular hard drive?

Is it possible to use an external hard drive for time machine backup and also as a regular hard drive?

I am using an external drive in the exact way that you described. You just keep it plugged in to the computer when you want to access the movies and files. In order to put files on it, just go to finder open up the drive under devices and drag and drop files onto the drive. It is just like using a usb drive with a terabyte of space.

Which format for external hard drive to use with time machine backup and connect to windows laptop?

Hi! I have an external hard drive on which I have transferred my iTunes library (just mine - not others). I have also a folder containing just films (some but not all of which are in iTunes too) Everything has been working just fine until yesterday I noticed that Time Machine was not including the external hard drive in back up as it wasn't formatted. So I have moved everything back to the Mac hard drive and and ready to format the external hard drive - but understand that if I do the contents cannot be opened from a windows laptop ... is that right? Is there are format I could choose that would allow Time Machine to back up and allow Windows to open as well (the idea being that I take the external hard drive with me on holidays etc!!) Many thanks for any advice.

ok - I understand. I have managed so far to format the drive (on windows) to exFAT file system - which apparently works with both Windows and Mac - but you're correct - it will not be included in time machine backup as I have checked the back up files and Samsung is not showing. Reckon I'm onto having to buy yet another portable hard drive just for windows - or of course buy myself a new mac book!! Can I ask you please - does the drive have to be clear of everything before I change the format - or can I change it with the files still in there? Also, got any quick ways duplicating the files onto another External Hard drive (for use on the windows laptop) At the moment the files are taking 2/3 hours + to copy over! Thank you!

How can i format my external hard drive to write files from Mac without loosing the files that i alredy have on my external hard when i used it with windows?

How can i format my external hard drive to write files from Mac without loosing the files that i alredy have on my external hard when i used it with windows?
I have been using Windows to write files to my 1TB WD external hard drive and I do not want to format to loose the files capacity of around 500GB
Someone, Please help

Hi Allen,
Is there any way to store the back up to Mac and restore after formating?

How can a format an external hard drive to Fat 32 format

how can i format an external hard drive to a Fat 32

Drive Preparation
1. Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to MBR then click on the OK button. Set the format type to MSDOS (FAT) Click on the Partition button and wait until the process has completed.

If I have to format an external hard drive to make it Mac compatible, will it delete all the content in the external hard drive?

If I have to format an external hard drive to make it Mac compatible, will it delete all the content in the external hard drive?

As others have said, the answer to your question is a big YES. Formatting a drive will delete everything!
To keep your data, yet reformat the drive for optimal Mac compatibility, you will need to:
1) copy your files to a different hard drive (I would recommend two different locations if you value your data)
2) repartition/format the external drive
3) then copy the files back to the external.
You haven't given details but if you need the external to ONLY be compatible with the Mac (and no longer care if if can be read by Windows), then you will want to partition the drive using the GUID partition scheme, and format as the (HFS+) "Mac OS Extended (Journaled)" filesystem. You can do so using the built-in "Disk Utility" application on your Mac (in the Applications/Utilities directory). Here are instructions:
http://support.apple.com/kb/ph5845
If you need the drive to be compatible with both Mac and Windows computers then please post that so someone can recommend a solution for your specific needs.

I can't format my external hard drive, some one please help me.

i can't format my external hard drive, when i am trying using disk utility its some times not showing the erase option. when its shows erase option its saying earase failed can not unmount the disk.

Repair the Hard Drive and Permissions - Mavericks, Lion/Mountain Lion
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Repair
When the recovery menu appears select Disk Utility. 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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu. Select Restart from the Apple menu.

I get the following error when formatting a external hard drive. Partition failed with the error: POSIX reports: The operation couldn't be completed. Cannot allocate memory

I get the following error when formatting a external hard drive.
Partition failed with the error:
POSIX reports: The operation couldn’t be completed. Cannot allocate memory
I have a Macbook pro 13" A1278. I purchased it around december 2010. I have a HHD 3.5" drive desktop select II 1.5TB. I purchased it around Febuary/March 2011 to use with my Macbook pro. I formatted it and moved all my files to there, I got it so my macbook's hard drive wouldn't brake and I lose everything on my macbook.
Is there any fixes?

First, try a system reset. It cures many ills and it's quick, easy and harmless...
Hold down the on/off switch and the Home button simultaneously until the screen blacks out or you see the Apple logo. Ignore the "Slide to power off" text if it appears. You will not lose any apps, data, music, movies, settings, etc.
If the Reset doesn't work, try a Restore. Note that it's nowhere near as quick as a Reset. From iTunes, select the iPad/iPod and then select the Summary tab. Follow directions for Restore and be sure to say "yes" to the backup. You will be warned that all data (apps, music, movies, etc.) will be erased but, as the Restore finishes, you will be asked if you wish the contents of the backup to be copied to the iPad/iPod. Again, say "yes."

Hello once again.. i have formatted my external Hard drive it using exFAT, now my windows cant detect my device, can u plzz help me the whole purpose is getting ruined, i use Windows 7 ultimate 64 bit

hello once again.. i have formatted my external Hard drive it using exFAT, now my windows cant detect my device, can u plzz help me the whole purpose is getting ruined, i use Windows 7 ultimate 64 bit

This is a problem with the Mac OS X implementation of exFAT. I've had the same problem.
Best is to use a Windows box to format the drive exFAT. Then it can be read by both Windows and Mac OS.
But aren't Macs supposed to "Just Work"? Not in this case.

How can I find out which mac format my external hard drive has

I have a PD LaCie drive. I had formatted it about a month ago, but now reading several posts, it appears that the best format is mac OS extended (journaled). I am not sure if that is the one that I had originally chosen. How do I find out which format my external hard drive has?
Thanks.

Select it on the desktop or in the Finder's sidebar and choose Get Info from the File menu. If it doesn't show up in either location, check the settings in the General and Sidebar tabs of the Finder's preferences.
(63966)

Is it possible to format an external hard drive on my mac?

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