Question about Western Digital 250GB ELEMENTS EXTERNAL USB 2.0 250 GB Hard Drive

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Why won't My external Hard drive work on a Macintosh

I just bought a new western digital 250 GB 2.5" external hard drive with no external power supply. I formated it on windows vista but need to back up info on a Mac as well which it does not work on. Whenever I try to drag and drop to the icon it says that this item is unchangable. Please help, the only reaon I bought this was to back up items from all my computers.

Did I format it improperly or with a particular setting?

thanks in advance!


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Re: Why won't My external Hard drive work on a Macintosh

Don't worry just download NTFS-3G for mac its free. Then you will be able to write to Windows NTFS formatted hard drive and drag and drop. Just search for it on

Posted on Sep 28, 2010

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Re: Why won't My external Hard drive work on a Macintosh

You probably formatted it with an NTFS filesystem. The Mac won't read NTFS drives. You will need to reformat the drive (after backing up the data that's on it) with a FAT32 filesystem. AFAIK FAT32 is the only filesystem that can be read by both Mac and Windows.

Posted on Jan 19, 2008

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This means the Input power can be from 100 volts to 240 Volts AC, and at 50 to 60 Hertz

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Asian Power Devices Inc. has a model DA-24B12 that fits these specs.
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Go to any computer-store, and buy a new "empty" external drive enclosure.
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first of all , you are looking at the wrong voltages. The important voltage is the DC OUTPUT, which is the voltage the external harddrives use AND the polarity of the plug attached to the harddrive end of the cable.
if both the harddrives have say 12v dc output and both have the insignia of the center conductor being + (posative) then you can interchange them. and you CAN run a 9volt unit with 12volt DC power, but not the other way around.
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should be a half-circle with lines depicting the polarity(+,-) of the center and sheild connections to the hard drives printed on both the harddrives and the power adaptors . This can also be tested with a dc volt meter while the adaptors are plugged into the wall.
DO NOT try to test the AC end while plugged in!!

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Hello Klpook, Hi, 1. scan your PC with an antivirus software, if the action failed to work, 2. use another PC to check if your Hard drive is good. if the other PC failed to detect you hard drive. 3. Use Hard drive utilities, such as Disk manager for Western Digital to diagnose your HD. If by chance no positive work is done. Your drive is bad.

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