


Fortunately that drive can be replaced with the Ultrabay Slim HD Bay Adapter IV which in turn can be equipped with any 2.5″ drive up to 9.5 mm in height. The W540 comes with a DVD drive, which is totally useless to me. Since the laptop can be equipped with two 2.5″ drives I went for that option instead (see below). The problem is that only really tiny SSDs of the 2242 (22 mm by 42 mm) form factor fit into the slot and those are scarce. Although that is not officially supported (Lenovo only supports 16 GB caching SSDs for magnetic hard drives which I am not exactly a big fan of), using a 128 GB M.2 SSD as a boot drive should work just fine. If you did not the slot remains empty and can be used for an M.2 SSD. One hosts the WiFi adapter, the other the WWAN adapter if you ordered that. If you wonder what made me choose the W540: read this.

Having made the switch from my trusty Lenovo T520 to the W540 here is my account of what works well and what does not.
