by Ken Task.
Uhh ... you might not want to include from yahoo EMail the message you received in the reply.
The unsubscribe links and preferences links then are clickable.
I checked your response via smartphone mail and could see two attachments (supposedly images) - broken in display of the message and didn't care to download to view ... soooo ....
Debugging ...
Site Admin menu -> Development -> Debugging - set to 'Developer'.
Then try your backup again.
When/IF moodle reports anything, copy the text of the debug output to a text file.
Come back here and post a reply. Copy and paste from the text file into the response.
Even if Moodle debug doesn't show anything, copy the text of the error page your get (the Opps) to a text file. Then come back here and reply. Copy and paste from the text file into the response.
Picture is still worth a 1000 words, however. ;)
'spirit of sharing', Ken