Pls help!!!
We checked
-company file verification ok
-enough space on both system drive and target backup drive
-schedule or backup now both failed.
-company file size is 2GB

The error only says "Unable to backup company file" and "Unable to commit file write operation to disk" without detail.
Error message:
08/10/2017 04-40-13 AM | Backup Started!
08/10/2017 05-36-54 AM | Backing File: xxxxx.QBW Unable to commit file write operation to disk
08/10/2017 05-43-14 AM | Backup Finished!