Below is the query that I am using to backup (create a .bak) my database.
However, whenever I run it, I always get this error message:
Here is what I did to by-pass the issue.
1) Go to backup
2) Remove the destination file-path to disk
3) Click on Add
4) In the File name: check box manually type in the backup name after ..\backup like below where Yourdb.bak is the database backup name
C:\Program Files\Microsoft SQL Server\MSSQL11.MSSQLSERVER\MSSQL\Backup\Yourdb.bak
5) Click on OK
Hope this helps!