The USB3.0 TO ESATA ADAPTER lets you connect any external eSATA hard drive, solid-state drive, or optical disc drive to your USB-enabled computer system -- a great solution for computers that don't natively support eSATA, such as MacBook and Ultrabook computers. Maximum Performance To maximize performance and utilize the speed potential of your SATA 6 Gbps drives, the eSATA HDD cable is compatible with SATA revisions I/II/III and supports transfer speeds up to 5 Gbps through USB 3.0. Broad Compatibility With support for Blu-ray/DVD/CD ATAPI / ODD drives and large capacity HDD / SSDs (tested up to 4TB) the USB hard drive cable is compatible with virtually any eSATA device, and can greatly increase the storage/backup capabilities of your computer. The hard drive adapter cable ensures a hassle-free connection with simple plug-and-play installation.