For storage, for free options I’d recommend filen.io, which gives you 10GB free. If you’re open to other paid options, proton drive and infomaniak drive seem alright.

Just skimming the alternativeto entries for google photos, the open source alternatives to Google photos look like they tend to be either paid or self hosted. Stingle Photos has a free 1GB tier you could try out. Otherwise, paid options include Stingle, ente, and seafile, and self hosted options include immich and Nextcloud (which is also a drive alternative).