That and https://filebrowser.org is free.

Either pay a cloud storage provider about $4/month to hold it for you, or buy a couple external drives and verify your backups yourself about once a year then replace drives as they eventually fail.

I figure the break even point is about two and a half years. If you’re committed to hoarding your content for longer than that, buy storage drives. If not, rent cloud storage. If your drives die in less than that you would have been better with cloud storage, but that isn’t likely.

Try Webtop. It’ll give you a literal Linux desktop in the browser and it works pretty well for me.

Seafile has SeaDrive which mounts like an external drive and works just like other similar services like OneDrive.

Dozzle may be a bit basic for your needs, but it could be one tool in your toolbox.

I like to prefer images from a known source like linuxserver.io.

https://silverbullet.md/ and I may start using https://d2lang.com/ too.