I run a synology nas, and use their photo system. Occasionally I’ll run thru critical apps (med schedule/dosing/refill reminder, blood pressure logs, signal…) and make backups, then stick them/update them in a folder on the nas, etc.

Basically anything I want to keep, goes on the nas. What’s on my phone is just temporary, and disposable.

For stuff like calendar and contacts, I run radicale and then sync it via DAVx5, then use Fossify Calendar and such. I moved away from G 8 years ago, and the only link is my yt channel (meh, disposable), nest (smoke alarms and thermostat), and store credit card (for buying devices). Calendar, contacts, tasks, notes, drive, photos, etc are all handled by the nas; email is through my hosting provider.

And while I’d like to roll my own hardware for a nas, the synology system is pretty forgiving to new users, and while I think I can do it, it’d be more work and more monitoring, so I’m staying put until something lights a fire under me.