I think I had this guy’s exact issue and maybe even stumbled upon his comment in that Microsoft support forum thread. It looks very familiar, but I could have just seen the meme before.

My problem was that I needed to do this for 100+ files, so using the UI individually for each file was out of the question. The eventual solution I found was in this tutorial for adding a context menu entry that changes folder/file ownership recursively. It’s been very useful!

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I don’t know about the Obsidian-specific stuff for linking notes and such, but I know it uses Markdown for the text of the notes, which is a common standard.

Here is a guide for Markdown basic syntax. Here is a guide for Markdown extended syntax for things like tables and footnotes.