I've 2 * 250GB FAT32 USB hard disks connected to my NSLU2, for use from my purely M$ home network. I've read that the NSLU2 favours ext3 and all things Linux in general. I wished to use the NSLU2's built in backup feature to regularly backup from one drive to the other, but I'm not sure if this works between FAT32 formatted drives (even if it does work, would it mangle filenames, etc.?) Although I'd rather keep this 'on-board', and not drive it from one of the client PCs, I googled about for an XP file sync utility just in case. This search turned up a free file sync tool by M$ themselves - SyncToy. A recent addition to their free XP PowerToys range. http://www.microsoft.com/windowsxp/using/digitalphotography/prophoto/synctoy.mspx Just thought I'd highlight it in case it's of use to anyone else. Even if I don't need it for the NSLU2, I've already found other applications for it around my network (e.g. backing up from the clients to the primary NSLU2 disk). Pedro.