Also I'm not able to send data to drive now. 

Have deleted the android/fuelio folder, signed out and in in drive in the app, and get the following error:

Something is wrong with Fuelio's directory / structure on your Drive. Please, Sign Out and Sign in to your Drive account again to fix this issue.

Ah thanks! That worked! However images are ofcourse not included in this. I have the original folders with pictures still as a backup. Can I recover these as well?