HP x911S SSD USB 3.2 Flash Drives Classic look with high durability Solid state drive architecture USB Flash Drive Sustain Transfer performance 400/200 MB/s,7-10X better than general USB 3.2 device** Best solution for large files transfer Push-n-Pull design, easy to use and no way to lose the cap Specification Storage Capacity 128GB/ 256GB/ 512GB/ 1TB Interface USB 3.2 USB Connector USB Type-A Read Performance 128GB/1TB: up to 500 MB/s 256GB/ 512GB: up to 410 MB/s 128GB-1TB sustains in 400 MB/s Write Performance 128GB/ 1TB: up to 450 MB/s 256GB/ 512GB: up to 300 MB/s 128GB-1TB: sustains in 200 MB/s Dimensions (L × W × H) L 74.2mm x W 19.9mm x H 7.8mm Weight 21g Operating Temperature 0°C to 60°C Storage Temperature -25°C to 85°C System Compatibility Windows 7, 8 ,10, 11 Mac OS: 10.3 and above Warranty 2-year Limited Warranty Note *Based on the HP x911S 1TB internal test result **Comparing with the USB 3.0 flash drive read/write speed less than 70/30 MB/s. ***For Flash Media Devices, 1 megabyte = 1 million bytes; 1 gigabyte = 1 billion bytes. Actual usable capacity may vary.Some of the listed capacity is used formatting and other functions, and is not available for data storage. ****While continuously operating at very high temperatures, or long –term usage can degrade the sustain speed.