VISIONTEK DriveXpander Hot-Swappable 2.5" drive expansion slot adapter expansion slot/ 2.5" drive SATA III 6.0Gb/s. Whether you"re looking to increase your drive storage capacity, access swapped-out and/or archived drives, or utilize drives like memory cards, the DriveXpander opens up a new world of storage convenience for PC desktop and legacy Mac Pros. After an easy two minute install in any open full sized expansion slot on the back of your machine, you can swap 2.5 SATA hard drives and solid state drives as you desire.