USB ATA is an adapter bridge between the USB and the External serial ATA (eSATA) interface The adapter will allow the attachment of external eSATA devices like hard disk peripherals to PCs and MACs eSATA is an external SATA cable interface The primary eSATA device usage is the external hard drive storage enclosures This USB to eSATA adapter allows users to connect a SATA hard drive enclosure with an eSATA data cable to any Macintosh or Microsoft Windows computer with a USB 2.0 port SATA hard drives provide a fast and reliable method for storing large amounts of data The problem in the past has been that SATA enclosures required an external SATA connector that many computer models did not provide With the availability of this new USB to eSATA adapter any Apple computer with a USB 2.0 port can be connected to an SATA enclosure Connector: USB A male eSATA A male