I bought a SSD from someone who claimed it was bought brand new, but never used. The disk is a Samsung 850 pro 512GB. No signs of wear, but S.M.A.R.T. attributes report a usage of 54 days, approximately 1,5 TB of writes and 712 times powered on. Could those numbers indicate the Samsung testing process? I doubt it and I think I am going to ask for a refund. What do you guys think?