This case is easy to open, the disc must be placed in rails and completely re-insert into the case. No screws are supplied with. The housing is narrow and it is not very easy to put it all inside, especially if the screws have some big heads (I have not been able to put 4). However after inserting it holds well!
The case is discreet and does not take up space.
It was immediately recognized by the Mac, and works perfectly with Time Machine in Yosemite (1.2TB backup in about ten hours, Speed TM). He is recognized as bootable volume by the OS via the alt key at startup. It only uses a USB2 port. Very decent product for its price.
