[DruTheFu]

EDIT: On second thought, let me try to type in the path including the credentials manually. I'll report back...

That is most likely what you need to do. The example l posted is exactly how the string would appear when typing it out. Kodi is nice when adding sources through the gui in that it just asks you what you need to enter (ie, username/password) and then constructions this url string for you in the background. If you check your sources.xml and have a SMB source with a user/pass that is how it would look.

@robweber - After everything I've tried, I'm still getting nowhere in getting this Add-On to work. Every time Itry to run the backup function, I receive the "Write Error Detected" message. I'm posting two log files.

• Log 1 (answering 'No' to proceed after encountering "Write Error Detected"): http://xbmclogs.com/show.php?id=399936
  
• Log 2 (answering 'Yes' to proceed after encountering "Write Error Detected"): http://xbmclogs.com/show.php?id=399652
  

When I press 'Yes' to proceed after encountering the "Write Error Detected" warning, the add-on appears to function correctly in the progress bar, but when I check on my workstation, the directory that is created from the process contains 48 Files and 1,626 Folders....but it is 0 bytes...empty. It's confusing to me that even when presented with the write error and proceeding, that the add-on has the ability to write/create folders/directories, even the 48 files that equal 0 bytes, but cannot write the actual backup files.

Looking in the logs, I see that when this add-on is connecting to the SMB shared directory, it passes the credentials as 'smb://USERASSWORD@'. I don't know if the log is masking the true credentials for security, or if the add-on is literally sending this string.

Some things I've done/tried:

• Believing that it was actually a user credential issue on my Windows 8.1 machine, I went ahead and created a whole new account, making sure to not include any spaces in the username (my primary account contains a space, and I thought that may have been the original culprit). I correctly setup sharing and applied the proper permissions of this new account to the directories.
  
  
• I've installed the 'ES File Explorer' app onto my Fire TV. Using the credentials of the new account, I am able to successfully able to connect to the exact same directory that my backups would be transferring to via the Backup add-on. I am also able to write and overwrite files in both directions. This leads me to believe that my permissions and credentials are intact.
  
  
• Now having the ability to copy files back and forth, I've been able to inspect my 'passwords.xml' and 'sources.xml' files. The content in these files correctly reflect the proper credentials and smb mounts.
  
  
• Within the Backup add-on settings, I have tried a number of different combinations for the destination of the backup. I've set the path via 'Browse', manually via "Type Path', and multiple combinations within 'Type Path', such as with including the username/password, without the username/password, using the physical IP Address in the path, using the name alias of the machine...and many combinations of the lot.
  
  
• Using the 'Fire TV Utility App' on my workstation, I am able to successfully run its backup feature to transfer the same files from the AFTV Kodi installation to my workstation.
  

I was thinking another thing to try would be to completely uninstall the Backup add on, delete any directories related to the add on and reinstalling and trying all over from scratch.

Is there anything else someone can think of, or something else to check?