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Now that the new OnionShare has better command line support, I just wrote a guide explaining how to run your own anonymous Tor dropbox on a Raspberry Pi. Check it out: https://micahflee.com/2021/02/onionshare-anonymous-dropbox-raspberry-pi/
If you have any leaks, load this URL in Tor Browser to send them my way: http://vxat6yszh7o5r2fxzvibxsb4lmfi6yzudobn3o3yz2vhvue3z2xmbqid.onion
Server run by the main developers of the project 
It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!
@micahflee Thank you very much!