ASUS UX31A-R4005G laptop M.2 SSD was upgraded from 128GB Sandisk to 500GB Samsung 850 EVO M.2.
18-pin adapter had been used to house the 500GB Samsung 850 EVO M.2.
128GB SSD had been mirrored to the new 500GB SSD keeping all files and programs intact.
Old 128GB had been placed to an enclosure as an extra storage.
ASUS UX31A-R4005G M.2 enclosure