This is a portable SSD with 4TB of storage and a maximum transfer speed of 800MB/s. It has been used for less than a year since purchase. The exterior has no noticeable dirt or scratches. It is formatted in exFAT. (Format can be changed upon request) No operational issues were found in a Mac First Aid check. All accessories are included (see photo 7): - USB C to C Cable (unused) - Manual - Outer box - Model: Crucial X6 - Storage Capacity: 4TB - Supported OS: Windows, macOS, Android - Maximum Transfer Speed: 800MB/s