Memory Stick-compliant flash drive offers portable storage in a compact package with plug-and-play convenience. Write speed is up to 5MB per second with USB 2.0 interface. Read speed is up to 12MB per second. 4GB flash drive is compatible with USB 2.0 and 1.1 USB ports as well as Windows ME, 2000, XP, Vista 7, Linux 2.4 or later, Mac 9.0 or later. Flash drive does not have password protection or encryption protection.