[WernerL]

I do have the same issue using version 3.9.13 on an iPad. Trying to backup to Onedrive looks perfectly fine first. I can select the file location for the backup, enter the neame for the *.msg file and it even appears as if the backup db is getting created. There is no crash of the app. However, there is no backup file created on OneDrive. Backing up to the iPad itself works perfectly fine.

Side note: I am importing all my sheets from Onedrive and this works fine as well.