The MB326SP-B fits up to 6 x 2.5” SATA HDD/SSD (5mm - 9.5mm) into a single external 5.25” bay with the ability to hot swap for easy drive replacement. The ExpressCage name reflects the tool-less drive installation design that makes installing your drive just as simple as a tray-less device, and optional bottom tray screw holes are provided for extra protection and added stability.