This is the portable SSD "SSPA-USC1K". It has been used a few times. Therefore, there are some minor scratches. I believe the functionality is completely fine. This product supports the high-speed interface USB 10Gbps (USB 3.2 Gen2) and boasts fast read and write speeds of approximately 1,000MB/s. - Brand: I-O DATA - Capacity: 1TB - Transfer Speed: 1000MB/s - Connection Terminals: USB-A, USB-C - Compatible Devices: Mac, Windows, iPad, iPhone - Format: exFAT - Features: Time Machine compatible Thank you for viewing.