StarTech.com USB 3.0 eSATA Dual 3.5 SATA III Hard Drive RAID Enclosure with UASP and Fan (S3520WU33ER) Achieve greater drive capacity or secure data redundancy with built-in hardware RAID controller Maximize performance, with file transfer speeds up to 6Gbps using eSATA Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported host Versatile connectivity options, through either USB or eSATA Versatile connectivity options, through either USB or eSATA Time-saving file transfers, up to 70% faster than traditional USB 3.0 when used with a UASP-supported host Maximize performance, with file transfer speeds up to 6Gbps using eSATA Achieve greater drive capacity or secure data redundancy with built-in hardware RAID controller UASP Support (Attached SCSI Protocol Specification Revision 1.0) eSATA or USB Host Connection Compatible with SATA revision I/II/III (1.5/3.0/6.0 Gbps) Hardware RAID