This USB (Universal Serial Bus) 2.0 to e SATA Adapter means that you can connect a SATA or e SATA drive to your computer through an available USB (Universal Serial Bus) 2.0 port, essentially converting the USB (Universal Serial Bus) port to an external Serial ATA port. Ideal for 2.5" or 3.5", optical drives & e SATA enclosures, this convenient adapter offers a cost-effective solution that lets you quickly connect SATA based devices for testing & transferring files without having to open the computer chassis.