The case fits very well on my hard drive (Seagate Momentus 7200.4 ST9500420AS, 500GB). I have this plate removed from my HP notebook by replacing them with a SSD. Well done the proof with the silicone protector plate, connected via USB to a NAS, their service. Even the SATA-USB adapter (A continuous connector for SATA and power) still fits on top of the plate. FYI: the four corners are formed which can be stacked, the plates (protectors).