Redundancy is your best option regardless- that said, when those western digital easy-stores go on sale, I like to grab them for offline storage. Something like rsync every couple of months and you have a decent second copy of your data to keep on a shelf. The $/Gig was hard to beat, I haven’t gotten any in a year or two, but there were sales to get the drives with enclosures for like $130 for 8TB. At the time, that was far less than I was paying for internal NAS drives. Since it’s not a daily driver, you don’t need super high runtime or performance.