The SL660 is a high-speed USB 3.2 Gen2x2 NVMe storage device that should be capable of transferring files extremely fast, as Lexar advertises up to 2,000MB/s read speeds and up to 1,900MB/s write speeds. For full speeds you’ll need a PC with a matching USB 3.2 Gen2x2 port, but the drive is backwards compatible with prior USB 3 versions too.