Good evening Geeks, I'm running XP Home SP3. I've got an 8GB usb flash drive formatted in FAT32 that tells me the "disc is full" when I know its empty. I think the problem is that I'm trying to write a 4.5GB file and as I understand FAT32, max. file size is about 4GB. I noticed that a format option is exFAT which surprises me because I understand exFAT came out with Vista. So how come I have it available on my XP machine? This sounds like a pretty good thing to reformat my flash drive to exFAT to take on larger files.