Has a M.2 slot doesn't mean you can put any M.2 ssd in it, especially M.2 2280 is the most common size and easily can buy on store/online, smaller than that is

Has a M.2 slot doesn't mean you can put any M.2 ssd in it, especially M.2 2280 is the most common size and easily can buy on store/online, smaller than that is mostly for OEM devices and you don't have many choices available.