There is a new way to get the worlds off your device in 2.1.
In 2.0 and before you were limited to Dropbox, plus direct SD-Card access (on Android devices only).
In 2.1, it is possible to upload your worlds to Transfer.sh service. This is an anonymous filesharing service that does not require creation of user accounts or logging in. After uploading your file, you get a link that gets copied to clipboard. The link is valid for a few days. After that your data gets automatically deleted from the servers.
This is how transfer.sh shows in the upload destination dialog:
This is what you get after the upload completes:
Look Ma, no accounts needed!
Kudos to the Dutch Coders!
