Make sure you get a M2 3x4. I had a bunch of screws laying around from a tablet and one of them worked. It needs a bit wider head than normal. Note you do have to remove the screw and bracket from the existing one to install. Existing one in my M15 was an Intel M2 500GB. Main bottom cover was not too bad to get off either and nice that they don't cover one screw with a label. According to Dell no warranty issues if you remove the cover just turn off the laptop (duh).