I would post this in foss and programming tbh.

But my personal suggestion is use nextcloud as a one stop solution for all your cloud needs. I host my own server and one for customers. This means I have my files, notes and photos synced on all devices without pricacy invasion (provided you have a good vendor or host yourself).

As a professional I want to stress that syncing devices is much more complex than most people think. They either need to be physically connected to sync or they need a server in between to help them sort out ip changes etc. This makes nextcloud the best solution imo. Seamless and private.