Once you create a backup plan and start backup, there is not sign of backup is happening. So I stopped and tried to copy the files directly with another Windows user. Got an error, saying drive is read only, so either I have to partition or format. So instead of partitioning, I tried formatting with recommended exFAT with 64 kilobytes allocation. Could not believe, it took so much time to create a folder. so I had to cancel and start copy once again, This time again it said drive might be corrupted. So formatted once again with 256 kilobyte allocation exFAT. Also changed my USB connection to another Port. Started copying as expected.. Yet to check with another computer whether still the same problem of readonly will come again..DID not use the toolkit, since I did not find it so user friendly. Also did not under the mirror file concept..