SSD is used to replace the original one (a SanDisk 120GB) Zenbook UX31E a. The original operating at idle. The replacement requires the use of an adapter to M.2 Asus proprietary connector (Sintech brand purchased on aliexpress to 15). Installation is simple. The original disk cloning to the new is a bit more complex (using GParted and Clonezilla).
Since the Zenbook found a second youth. The only regret is not having done the operation before.