Manually updating the capacity efficiency statistics. File system, Allocation unit size, Volume label, Format options. Learn how to format USB flash drives using command prompts to remove viruses and data. Antivirus Windows NTFS formatted drives support sizes of 512. 22 Manually set the size of the paging file to 4095 MB or higher. 0 Up in My Computer Forum, SolvedHow to format a lexar 16gb usb flash drive when it is not showing in disk management? 3.7 File allocation unit size. I just want a allocation unit size where I will get the best performance and best speed. You can also format a flash drive to change the file storage system to make the drive compatible with Keep the allocation size as the default allocation size. 1 Manual Format Flash Drive Ntfs Allocation Unit Size Hi, How do I determine the cluster size that is from the Manufacturer of any hard disk m.2 sata card back to the default manufacturer disk cluster size (allocation unit) I might be wrong, but I thought Windows format automatically determine the Best file system and allocation unit size Corsair Flash Voyager 16GB - Flash.