Alternative to Dropbox

[ralphy]

There are other robust solutions that don't specifically depend on the OS provider per say. E.g.: Syncthing or even Nextcloud.

I personally prefer Syncthing because it doesn't require a middle-man provider and the installation is pretty straight forward; your files are synced only within your own computers (those you install syncthing on) never storing anything off of your own devices. Nextcloud does require a box to act as a server though and there is initial configuration and some maintenance from time to time.

Irrespective, these are both solutions inclined towards putting yourself in control of your data and it could be a nice learning experience if you have the time to dig into them.