

Yea if you don’t need much then you can do with exporting not a lot of stuff.
Google is evil but I know that GDrive has pretty low prices on data storage
There are many cold storage services out there with good pricing. If you need a VPS with good storage (to automate sync, etc… idk), I know I would use Interservers, based in the USA, priced at 3$/TB/month (HDD)
But if you only want to sync a small amount then you can do with free services, probably. Don’t forget to encrypt everything when uploading to these services! Don’t want them to be able to see the content of your files.
In a span of a year, I had small visual bugs appear, drag and drop not working (have to manually click “upload from computer”). Easiest way to avoid them is to wait before switching to a new major release. So things regularly break, but they’re not essential and your data should always stay safe.
I don’t know the docker container you linked but if it does that, or if you wait a bit before updating, then you should mostly be fine