Great question.
In any browser do a file save to your desktop. Open in a browser. That is a snapshot. There is a save file button on the wiki that should invoke a local save. Test by opening the saved version in browser. You can change the site title or subtitle
And through use of default tiddlers create a static version of your xememex tiddlywiki.
As for backups for other reasons:
It’s probably fairly easy to get xemememex files to save every save like tiddly desktop does.
I’ll cc the group on an email to xemememx developers. What should we ask for? Save to a local version of google drive or OneDrive or local drive. Named versions?
//steve.
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Steve Schneider
SUNY Polytechnic Institute