Offline storage is only easy on the very small and the very large scale. On the very small scale you can get archival-grade CD/DVD/Blurays. On the very large sc

Offline storage is only easy on the very small and the very large scale. On the very small scale you can get archival-grade CD/DVD/Blurays. On the very large scale you dedicate climate-controlled rooms to an automatic tape library. In between is a vast gulf where your only good options are disks that you have to occasionally spin up to check integrity, have the disk trigger a data refresh if it's an SSD, and replace any disks that failed and rebuild their data from redundancy (raid or whatever you prefer). HDDs die even when off [1] and flash storage in SSDs is only rated to hold data for three years without power. Sure, you can roll this yourself, but it can easily go wrong. Easier to either keep the disks spinning or pay someone with a tape archive (e.g. AWS deep glacier) 1 https://www.tomshardware.com/pc-components/storage/twenty-percent-of-hard-drives-used-for-long-term-music-storage-in-the-90s-have-failed https://www.tomshardware.com/pc-components/storage/twenty-pe...