I recently purchased a 6TB Seagate Backup Plus Drive for my Windows 10 computer. I copied all of the files from my 4TB Seagate Drive (which currently has about 3.5 TB used) to the new drive. Now the new drive shows approximately 5.45 TB used. I checked the "Properties" for each of the folders on the new drive, but the total space used is the same 3.5 TB on the smaller drive. There is no indication as to where the extra 2TB of storage is being used. Please advise.