I just tried downloading my posts for the sake of searching through them for a reference I made (edit: under user control panel > activity > download my posts). I got a file called “user-archive-Mkoll-170110-232835-19 (1).csv.gz.” I tried opening it with Notepad and got a bunch of Chinese(?) characters. I tried deleting the .gz extension and opening it as a .csv in Excel and got a bunch of jibberish, e.g.
No worries, I have notified the Discourse team, hopefully they will offer more explanation in the future. The users of Discourse tend to be pretty geeky, so they kind of assume everyone is familiar with common, everyday things like GNU compression naming conventions. I mean, it’s not like anyone has anything better to do, right?
On the other hand, the feature itself is pretty nifty!