[edit: Syncthing's Discovery Server probably counts as data, actually; you can work around that but then it's less "straightforward"]
I ended up uploading the file to Google Drive and using it's client. It works pretty flawlessly.
This should be fixed: https://github.com/syncthing/syncthing-android/pull/1724
Besides my general distrust of Google, the real source of my headache is the ransomware attack. Thus such a simple schema is unsatisfactory. And the proper automatic backup procedure needs noninteractive testing whether the cloud copy is not garbled. Until now I don't know how to do it so I make backups of my Dropbox copy by hand.
It’s closed source though.
I would like to see a comparison with Syncthing.
From my view, Resilio is still easier to use with better apps than Syncthing, and in theory their corporate business model seems sustainable (more so than the previous parent company) and can provide useful corporate support when such needs occur. But there's still lingering doubts after all this time that they will continue to do the right things, support the software well, and it is closed source so there's not a lot of community support options if the company's business model pivots in any accidentally similar way to the events that lead to Resilio existing in the first place.
If you can self-host a password manager, then in the case of GitHub [0] going down every month you can self-host your Git repositories yourself, especially if you have projects like wireguard [1] for example.
This is the conundrum I am in. I have been looking for a pocket-sized password manager, which can sync from something like a spreadsheet I keep in cold storage. This seemed to fit the bill:
So I purchased one. It's pretty cool, although the controls are a bit clunky. Overall, pretty cool bit of tech.
However, to import your passwords into the device, there is no way to do so with the stock software which does not involve uploading all of your passwords to their servers. That is asinine, if I am being generous.
I feel more comfortable with that than syncing a KeePass file over dropbox or google drive, mostly because I got myself into a nasty situation that way with a corrupted KeePass database a while back.