I got an external USB drive for backup and file transfer (between my PCs and MAC) only to learn that one does not support the other. 

I tried first formatting to FAT on the MAC, and that almost worked on the PC as some mac files were unrecognizable in windows7.

I then tried formatting to FAT using windows and that's worse. The MAC won't recognize the drive.

Anyone know how to get this drive to work on both PC and MAC?

Thanks

format NTFS... then buy mac drive

After you format it using Windows, did you re-install the driver on the Mac? I know mine needs to "installed" on every Mac I connect it to.

You say the Mac doesn't "recognize"? You mean it doesn't show up in your peripherals?

@Scott. Huh?
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What driver Rain?  Thanks
Yea, Not in the 'finder'. 
It shows up in applications/utilitlies/disc.

I found This which says to use windows, but to do  "Convert to MBR Disk".

I didn't do that. Is that my problem? 

you need to buy mac drive  only want this will work correctly

http://www.mediafour.com/products/macdrive

I tried to remember how I set up mine, but it was a while ago and the process was pretty simple actually, so much that I don't remember much. It's formatted NTFS, thanks to Paragon which came bundled w/ the Drive. (Seagate FreeAgent GoFlex).      

I simply installed and formatted it using my MacBook Pro - first thing I did afterwards was to hand it over to a friend who uses PC to transfer files. Worked flawlessly. But we have to run the installer/set up exe file on every new machine we connect it to. 

Did the same in Russia - the computer in the Green Room was a PC, and we used it to dump/exchange files. We brought the External drive, use the little set up app once and we were good to go.

I know this isn't helping - sorry, Tim.

Ok. hmm.
Sorry Scott. I'm not going to buy something just to get what I bought working.

How about this idea. Since the transferring between the computers is not that important. 

This is a 2TB drive. 
Can I format 2 separate partitions separately? 
One 200 gig for MAC backup and the rest for Windows.
So, one partition would be the MAC OS extended (or?)  and the windows would be the NTSF?
Thanks

the 2 format parts should work

Thanks Scott.