I zonked one of my large flashdrives (256gig) fat32. I checked it with test drive it was no good. I tried winxp disk management ntfs format but it knocked it back. In desperation I tried hp formatting utility fat 32 dos but it said the volume was too big. Then I tried the trial version of direct copy . i tried to copy the good flashdrive to the crook one but it crashed overnight and they were both stuffed. I downloaded swissknife and while I was waiting I stuck a flashdrive in the win7 laptop ready to operate on it. Up popped a popup saying the drive needed formatting - proceed? I clicked yes and it did it in less than 2 seconds - fat32. So there you go.