If anything, just get some external drives or something lol. Depending on how much space you are using, you can also look at hetzner. They have storage boxes that are relatively cheap for cloud backups.

You could also use OneDrive or Google, just make sure you encrypt everything. This way they don’t actually have any of your data. It’s just for backups.

I have also been using storj with truenas. You get a discount this way, but storj just introduced new pricing, so I don’t know how that impacts the discount or not

Please tell me you have proper backups for your next cloud instance

No it’s not. It’s very expensive to run and there are a lot of edge cases. It’s much easier to have regional redundancy for a fraction of the cost.