I've got 4 USB sticks lying around and only 1 of them reads. Searched for the better part of a day to find out why. Ultimately, Discovered what the problem was. You absolutely must use a MBR. As soon as I did that, all my USB sticks read just fine on the PS2 (Even Kingston). They were indeed set to GPT. To do this: Run diskpart Find your USB, select disk # Disk Selected? now 'clean' Now 'convert mbr' Close disk part. Run diskmgmt.msc Find your USB. Format it as FAT32. Should read just fine now in your PS2.