comments:
manzurfahim posted on r/datahoarder2w
You can get something like this, but get two, or better yet get three since you will be removing the main copy once done. Copy all photos to all three drives. Once done and verified, you can keep two copies with you and keep another copy with your parents or siblings or in a bank vault, just not with you. This is your offsite backup. Update them periodically, power up the drives once or twice every year, and you should be good. Disconnect when not in use.