Proton is looking sus now they are moving under the EU. VPS and Synchthing maybe

Synology nas, start 9, and tailscale since we don't have clearnet. (Not an expert, just what i have got to work)

Start9 allows you to run Nextcloud and/or File Browser locally which is great but ofc self hosting cloud has no geographic redundancy Synology make good prosumer NASs as a recommendation, had it with no problems for 10 years 👍