Cars & Other Vehicles What is a fit USB drive? What is a fit USB drive? The SanDisk Ultra Fit USB 3.1 Flash Drive delivers performance that lets you move a full-length movie up to 15x faster than with standard USB 2.0 drives. (1) Plus, thanks to its compact, streamlined design, you can plug it in and leave it in. Related Posts:Are USB 2.0 and 3.0 ports the same size?What does a 3.0 USB look like?Can you use A USB to USB-C?Is USB Micro compatible with USB-C?