Data backup is required to re-create a QB company file and a specific QuickBooks atmosphere in which the user was performing his task. It saves the precious QB company data in the case of accidental loss of QB Company Data. Before, performing the QuickBooks Unable to back up Company File steps be ensured that you are using the updated QuickBooks Desktop version. Firstly, Renaming of QB Desktop company file then Run data verify in your QB file after this Rebuild your data file and the last Run the QB File Doctor Tool. By following the above steps you are able to resolve QuickBooks Unable to back up Company File Error. If the problem still exists, contact the QuickBooks Error Support Team at (844)-888-4666 without any delay.