External Hard Drive not working thanks to disk utility format MS Dos?

hello everyone, i have a problem and i have no idea what to do, heres the deal.
a friend of mine bought a toshiba external 320gb hard drive, i have 100gb of video footage he needed, i opened the hard drive, used it without a problem, he took it home and he couldnt use it on his PC so i did some research and found out that to use it on a PC and MAC i had to format it using disk utility to MS dos, so i did that, after that both my macs dont recognize the HD and if i try a PC, it appears but you cant do anything with it, if i try to format it it says to insert a disk in that drive....
is there anyway i can fix this? or do i owe my friend a 320gb external HD?
thanks

Mac format is different than windows format. Fat32 is recognized by both systems, but has its limitations. You just need to reformat the drive to NTFS on a PC. I believe HFS+ was probably what your original drive was. If it was Fat32, it would have been recognized on the PC.
For future reference, just install the NTFS driver on your mac. You can find it here http://www.macupdate.com/app/mac/24481/ntfs-3g. Reformat the drive on a PC, install the driver and you can read and write to Windows NTFS drives and never have to worry about it again. Just right click on it in Windows and format it to NTFS.
Hope that helps.

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{quote}
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Message was edited by: dechamp

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Hi ,
welcome to HP support forums
i wish you to enjoy your time here
please ,
give me more info about your external HDD brand so i can search for more info about it and find out if it needs a specific driver
also , i want you to check your USB port you use
using another port may help , it can be only a problem with the USB port itself or the Driver
anothrt hard TIP : (Use it if you are good with SW problems only)
1.Use Ubuntu Live Disc without installing
2.connect the external HDD and wait till ubuntu discover it
3.now try copying anything t the HDD
now you will face two situations :
1. the copying process will work fine with no errors and now you know it was only a problem with the OS you are using (WIN 7)
2. the copying process won't complete and now there is also two possible things
the first is the USB port or the USB cable you are using >> try replacing it and change the port and repeat
the secong is that the new HDD has a problem or a Bad firmware maybe >> your old HDD has no relation with the problem now as Ubuntu starts in Live mode without using the internal HDD it starts depends on the CD itself and your Ram
Hope this to help you
don't hesitate to Ask again
Please mark my post as SOLVED if it has resolved your problem. It helps others with similar situations.
Mark Th. Antonio
Faculty Of Engineering Alexandria University

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Please refer to this How to Geek article.
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****I am not an HP employee****
Please give a" Kudos" if advice received is relevant or" Accept as Solution" if your problem has been solved.
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If you don't have any information on the drive which you need, try this:
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The EHD has failed and needs to be replaced. If you have not been backing it up then you are about to learn a difficult lesson about why backing up is absolutely critical.
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Now i moved to an arch machine (the one i have at home) and it doesn't mount the hard drive.
I tried as normal user and as root, i tried just
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here i post the output of "fdisk -l /dev/sdc":
sudo fdisk -l /dev/sdc
[sudo] password for pertica:
Disk /dev/sdc: 1,8 TiB, 2000396746752 bytes, 3907024896 sectors
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Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
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Dispositivo Avvio Start Fine Blocks Id System
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Shh, don't spoil his reading work

External Hard Drive not working thanks to disk utility format MS Dos?

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