Sooner or later, working with SQLBackupAndFTP you can get the following error message
27/11/2016 15:19:51 Creating backup of data_newlevel
27/11/2016 15:19:52 ERROR: Backup of data_newlevel failed: Cannot open backup device 'C:\Windows\TEMP\data_newlevel200910271519.bak'. Operating system error 3(The system cannot find the path specified.).
BACKUP DATABASE is terminating abnormally.
The Solution will be the next:
Please grant LOCAL SYSTEM (or LOCAL SERVICE) account with write/read permissions for C:\Windows\TEMP... folder or specify different temporary folder
Also, please make sure that you have enough free space on your drive.