The Syba SY-MRA55006 5.25? bay tray less mobile rack for 3.5" and 2.5" SATA III HDD with extra 2 port USB 3.0 can be installed into any open 5.25? drive bay, providing easy access to a bare 2.5" and 3.5? hard drive or solid state drive from the front of a computer case. To remove the hard drive, simply hit the eject button to unlock the access door, allowing the drive to be pulled out of the computer without having to dismount the drive. The mobile rack also included two extra USB 3.0 port which can be hooked to any motherboard with 19 pin USB 3.0 header.