I convert content to markdown and relevant images and then store them in an obsidian vault. I self-sync it with syncthing. It has quickly become a rather effective zettelkasten memory prosthetic on my laptop and phone.
I also use google/facebook takeouts, reformat the results, and store+index all my human-facing correspondence in there. Text is cheap and I avoid most images. Its still under 200mb and instantly searchable with a nice UI and as a bunch of markdown files it is easily portable.
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