I use the Obsidian Git plugin at https://github.com/denolehov/obsidian-git to keep my vault backed up.
This works with a private Git repository (like the private ones I use on Github).
I would only recommend this if you are already familiar with git - there are a couple of things that are less obvious about how it works. But for me and my workflows it's good.
Thanks to @idle @Dakspyker for pointing me at the Tag Wrangler plugin for #obsidian
https://github.com/pjeby/tag-wrangler
So all this time I had the tag pane disabled (!) and had totally missed the "list of all tags by frequency of use" list, which has prompted a certain amount of cleanup and tidying to at the minimum try to fix single-use tags. Tag Wrangler helps that effort.
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Ed Vielmetti W8EMV @pkm.social Amateur radio operator W8EMV, Obsidian user, old-school blogger.
I have been using wiki sorts of things as a "personal wiki" since the days of Socialtext (2002).
For better or worse I am also @w8emv on a number of other small, thematic Mastodon instances.