If you’re a regular internet user the Personal Data Storage paradigm won’t move your data from the cloud to your personal computer. Most people will still rely on an institutional cloud service, but instead of data-banking with a shareholder-controlled corporation people’s data can be entrusted to the equivalent of member-owned credit unions for data storage.
Ah, I see. Definitely possible to set up something like nextcloud or immich for file and photo backup. Then use a VPN like tailscale or wireguard to access while out of the house, or setting it up publicly available (usually being a reverse proxy).