You ' ve indicated the SSD is not new , and it ' s an 840 . You may want to consider installing Samsung Magician , or if you have another utility , check how many TB have been written . The 840 EVO uses TLC , which is less resilient than MLC found in the 840 Pro , or any 3 D NAND found in the 850 lines . It sounds as if cells are dying on the SSD to me . If you have Spotify installed , you may be looking at that as a potential contributor of premature failure of the drive , as it was recently linked to writing large amounts of data on a daily basis due to an overuse of the vacuum command to clean up the database . <| sep |> It ' s depressing to think how likely it is this idea gets floated before the next election . <| sep |> weak follow list