I bought this for a friend and intended to backup his minimal sized XP Home PC with it. The installation went fine but I ran into a slight glitch. It will not backup to his FAT 32 OCZ 16 GB USB flash drive. According to System Backup, it is not a valid disc for backups. So, for now, I had to use the hidden partition method included with the program. But this is not the best solution as it leaves the backups on the same drive as his Windows installation. Why would System Backup care whether the drive is portable or not? If it's a working FAT drive that is large enough to hold the data, what is the issue? Is there any way around this? If not, this should be heavily noted on the website that flash drives are not supported. I am very disappointed!