External Hard Drive Recognized on Mac, not Windows?

[itisme1760]

I have two external hard drives, one 250GB for my Time Machine, and one 500GB for other stuff. I had accidently formatted my 500GB to use for Time Machine, but realized, I didn't need that much storage, so reverted to the 250GB for Time Machine and the 500GB for storage. But it seems, in the formatting stage (for Time Machine), it set my file system for the 500GB to Mac OS Journaled. I can see this hard drive on the Mac, but it does not recognize it in Windows (although I hear the USB plug in sound, doesn't show up in "My Computer"). Does this have to do with the formatting? If so, how can I format it so that the external hard drives can be read by both Mac OS X and Windows? Does it require moving my data (before formatting?)?

Thanks.

 

[Andrmgic]

Windows cannot read HFS+ without a program like MacDrive(http://www.macdrive.com/) or HFS Explorer (http://hem.bredband.net/catacombae/hfsx.html)

If you want something readable and writable by Mac OS X and Windows without special software or kernel extensions, you'll need to format it FAT with Disk Utility.

The only trouble then is you'll hit a 4Gb file size limit on the files you store on the drive.