You can ruin the whole file system with just one wrong command! Read the rest of the hint for the process. Standard precaution - you'll work as root in terminal app, so you must be very careful. The idea is to create partitions on the target Windows system, and then format them on OS X. To make it work, you need only OS X and Windows - no special software involved. so I did my own research and developed this procedure. I did some searching on the Internet, but it doesn't look like there is full solution for this problem posted. So, the obvious solution would be creating one backup partition with HFS+, and the rest of the space leave for FAT32 as the most common standard. The original intent was to use it for backups of my TiBook, and for moving files around between Windows, linux and Mac OS X systems. I've got an external FireWire 160G drive.