If you actually want to do this, get a RAID 1 NAS like the Synology Diskstation 214 or 214+, stuff a couple 4TB drives into it, and then additionally set it to

If you actually want to do this, get a RAID 1 NAS like the Synology Diskstation 214 or 214+, stuff a couple 4TB drives into it, and then additionally set it to periodically auto-backup the valuable bits to Amazon Glacier. This ends up being a good bit more expensive, but you'll actually have your photos in 10 years instead of having just a dead hard drive.