So when I plug it in it copies/syncs the things on my computer, anyone knows somethign like that?

So you want to sync files from a drive whenever you plug it in to the computer? Sounds like a udev + rsync solution. Udev mounts the drive and runs rsync.

Rootless LXC containers, TLS. In my case, I have both VPS and my own hardware, so every sensitive data is hosted on the hardware only.

If you’re already self-hosting:

Document your setup. Write guides. Make it easier for the next person.

Heck yeah! This is exactly what I’m trying to do: https://codeberg.org/lch361/infrastructure.lch361.net (in the future I’m planning to move all code to a self-hosted Forgejo service, especially when it’ll implement federation). Infrastructure as code, performance metrics, automation - it’s all there. It’s not just a matter of self-hosting and privacy anymore. It’s an effort to make the engineering behind that more approachable.