3.5" USB 3.0 Esata Enclosure Features - Supports USB 3.0 SuperSpeed w/ a 5.0Gbps Max Transfer Speed - Latest USB 3.0 chipset provides a maximum transfer speed of 5.0 Gbps, which is 10 times faster than USB 2.0 (480Mbps) Supports eSATA w/ a 3.0 Gbps Max Transfer Speed - For users without a USB 3.0 port, a built-in eSATA port provides a maximum transfer speed of 3.0 Gbps, which is 6 times faster than USB 2.0 3.5 SATA HDD Support - External case, which is exclusive for 3.5 SATA HDDs Enhanced Cooling Performance w/ Aluminum Body Design - The whole aluminum-body design is effective against external shock and radiant heat of HDD