[hu3]

I use Microsoft's OneDrive free account to keep Joplin synced between devices.

Works like a charm. Currently using 0.7GB out of 5GB.

[funOtter]

Same here! And you can encrypt the sync so you know Microsoft cannot get access to your personal information.

[rrgok]

And how would you decrypt on mobile while allowing to edit the files?

Cryptomator works well as long as your on a desktop platform, but when you move to a smartphone they provide only their crippled file-manager which is not accessible form third party apps.

[precommunicator]

Joplin has built-in encryption, which works just fine on desktop and mobile, with shared passphrase between them

[t0bia_s]

OneDrive sometimes mark encrypted files as suspicious and makes sync problematic.