>The data being backed up is in tiers of importance or 'frequency of change', and based on this the backups are staggered, some daily, some weekly.
This right here is the key to backups: triage your data to understand what is truly important. I roughly put things into three buckets
- Priority 1 - potentially disastrous if lost. Financials, taxes, legal documents, and password vaults. The nice thing about most of these documents is that they are immutable and likely append-only (eg you only have one set of 2020 taxes). For most people, this amount of data should be well under 1GB and require only sporadic backups. Which means you can purchase a bolus of $10 thumb drives, encrypt the collection, and leave them everywhere. Mail an annual copy to mom, leave one in your bag, at the office -wherever.
- Priority 2 - anything you created which does not fall into Priority 1. Home pictures, videos, your 1000 half-baked programming projects, etc. Potentially a much larger collection for which a real backup system becomes necessary.
- Priority 3 - everything else which is theoretically replaceable. The archive of music you "acquired", backups of youtube videos, personally ripped DVD collection, etc