This is a portable external SSD from BUFFALO. It has a capacity of 1TB and supports USB 3.1 (Gen. 1) for high-speed data transfer. The drive has been completely formatted for this listing. It can be used for data storage and backup on a PC. Compatible with Windows / Mac. (Although the outer box only states compatibility up to Windows 10, it worked without issue on Windows 11.) * Shipping will be after January 5th. Thank you for your understanding. [Product Overview] USB 3.1 (Gen. 1) compatible, shock-resistant portable SSD 1TB Black Capacity: 1TB Compatibility: Windows and Mac computers equipped with USB 3.1 (Gen1) / 3.0 / 2.0 Type-A ports Connection Standard: USB 3.1 (Gen1) / 3.0 / 2.0 Size: (Width x Height x Depth): 79.5 x 13.5 x 119mm *Body only (excluding protrusions), Weight: 150g *Body only Accessories: USB 3.1 (Gen1) cable (50cm), Instruction manual Compatible computers: Windows and Mac computers equipped with USB 3.1 (Gen1) / 3.0 / 2.0 Type-A ports* [Product Details] Brand: Buffalo Product Type: External SSD Product Name: BUFFALO USB 3.1 (Gen. 1) compatible, shock-resistant portable HDD 1TB Black HD-PGF1.0U3-BKA Manufacturer: Buffalo Product Number: HD-PGF1.0U3-BKA Release Date: February 26, 2019 Product Contents: 1.0TB Color: Black