I have a SanDisk Cruzer Glide 8Gib 2.0(high speed) pendrive that keeps lossing the formatting (FAT 32). Tried to rebuild MBR, but that hasn’t helped. Any idea what’s going on and how-to repair it? Also, when original, drive showed 7.45 Gib available, after recent formats it shows 7.43 Gib. When queried, it shows “nothing” on drive??? Ran sector check and all came out 100%.