You should know where this is and it’s in the ~/Library/Application Support/typora-user-images directory.
In order to do what you’re trying to do, you should create a working directory in the Finder and index it. Then create and work with your documents in that directory.
You should also enable Auto escape image URL when insert [sic] in Typora’s Settings.
This is the result of my instructions…
Also, are you just creating Markdown documents in a group or are you creating groups that contain unrelated Markdown documents?
Or more simply, just edit in DEVONthink 