(Copied from superuser)
With SSDs getting cheaper and more mature, I am thinking of getting some for off-site backups. I would store system images and media backups on it, updated weekly-monthly. The drives would be rarely moved (although some shock tolerance would be welcome), stored at ~20C and powered on only to update the backups (so weekly/monthly). Considering all this, would I be better off with an external SSD or HDD?
(SSDs - consumer grade MLC/TLC, Samsung T5, HDDs - consumer/enterprise grade (not much of a diff anyway) WD, both in under 1TB varieties)