basically just follow this https://www.howtogeek.com/215400/how-to-turn-your-computer-into-a-dlna-media-server/
in case the link dies, pasting soem screenshots
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then when you use your smart tv, the windows device appears and u can browse thru. works for the samsung tv my family is using.
obviously in the future we will get a generic android tv instead so at least its easier to hack someth and not rely on inbuilt samsung tech
but for now, just works.
I found batch copying large files via UI is quite buggy. API is probably an option, but too lazy to setup google cloud platform or some horrendous UX, so i just tried out google one UI to batch download as zip file. and surprisingly works ok.
Next step, is to get an honest to goodness cold storage backup option