Two in one and even more. This exchange frame for one 2.5" and one 3.5" SATA hard drive fits perfectly into a 13.30 cm (5.25") drive bay, providing a unique space-saving solution. Additionally, two USB devices can be connected to the USB 3.0 Type-A hub. Both hard drive slots can be locked. The carrier-free design and HotSwap feature make swapping hard drives faster and more convenient. Depending on your needs, both hard drives can be turned on or off simultaneously without having to change the hardware. Main features: Storage medium size of the storage drive 2.5/3.5".