M.2, also known as NGFF (Next Generation Form Factor) is the successor of the mSATA standard for expansion cards. M.2 is very flexible and is widely used as an option for additional storage on the today laptop’s motherboards. It can vary in its size – at this point, commercially available are 30mm, 42mm, 60mm, 80mm, and 110mm lengths, which are commonly expressed like ‘2230’ (22mm wide, 30mm long), ‘2242’ (22mm wide, 42mm long), etc.

There are also three different types of “keys”, which purpose is to prevent the use of inappropriate M.2s – B, M and B&M.

Here is a list in which you can find the exact M.2 connector, found on your (next) notebook computer.