It turn 3.5"/2.5" SATA hard drive or 2.5 " solid state drive into an external hard drive for your PC and laptop for data transfer, support up to 16TB hard drive. as it stands its x4 drive caddies (Without any hard drives) and x3 sets of cables with currently one set missing but lets be honest the cables for these are very commonly used and cheap to buy.
eBay