** Read speeds up to 420MB/s, write speeds up to 380MB/s. USB 3.2 Gen 1 or USB 3.0 port required. Based on internal testing performance may be lower depending upon host device, usage conditions, and other factors. 1MB=1,000,000 bytes. (1) Based on 4K video transfer (4GB) with USB 3.2 Gen 1 or USB 3.0 host device.