So, I recently bought a 2GB and a 4GB Sandisk UltraII. I can format them in my PSP (not a real formatting, just erasing and putting psp-fodlers there) and use them when I use the PSP as a cardreader. However, I can't read or format it in my computers built in card reader. When I try to format it it just says that "card can't be formatted". I'm at a wall here. what should I do? (note: I haven't tried to format it through cmd properly since I don't know the appropriate commands. I know you should write "Format F:" where F is the device name but how do I format it to FAT32) Edit: Now I've tried "Format F:" and "/FS: FAT32" but with no result at all. It says my memory cards are in RAW format and when i enter "/FS: FAT32" it just says that it's an "incorrect syntax, filename or volumelabel". I've also tried using Swiss Knife (V3) but it just crashes when I click on the drive. Anyone with any ideas?