The question was not why i would want to but why i cannot. NTFS is needed for incryption of files larger than 4 gig which is important if you carry around your flash drives. But i have purchased two 32 gig flash drives that failed ntfs format. I suspect that companies are using chips that are defective to make these drives, chips that are ok for fat32 but not ntfs. I am am just interested in any comments about this, and how can you know if a flash drive will format ntfs before you buy it?