A compact box with 500W PSU for a small amount of money. I accommodated there 3.5" HDD and one 2.5" SSD as well as M.2 on the MB. One can squeeze one or two more 2.5" SSDs and even maybe an additional 3.5" hdd. I do not use CD unit so there is a space.The chassis is made of a very thin metal though, I think it is thinner than a beer can, an almost a foil, therefore do not tighten screws too much because you may destroy threads. Also supplier could include a couple of low profile PCIe steel blanks but there are none :-(. A PSU's fan is a bit noisy and is cumbersome covered with an odd plastic grille (really?) seen only from the top, but that is OK if it is a server (FreeBSD in my case) and not a desktop PC.