Today for review I've got a drive cage from iStarUSA called the BPU-2535V2 that holds two 2.5" SATA hard drives, in the space of a single 3.5" bay. Each bay of the cage locks individually, and you can use either one or both or just swap drives as needed. I swap a lot of drives in and out of my computer for testing and I found this to be a very useful product to have in my computer. So read on to learn more..