Zalman HE250 U3 Storage Enclosure - External - White HE250 U3 Drive Enclosures. Supports USB 3.0 SuperSpeed w/ a 5.0 Gbps Max Transfer Speed - Latest USB3.0 chipset provides a maximum transfer speed of 5.0 Gbps, which is 10 times faster than USB 2.0 (480 Mbps). Supports 2.5 SATA HDD - ZM-HE250 U3 is an external HDD case, which is exclusive for 2.5 SATA HDD. Enhanced Cooling Performance w/ Aluminum Body Design - The whole aluminum-body design is effective against external shock and radiant heat of HDD