Here is the written description, I don't want to post a bunch of pictures.
5/15/2016
8:15 AM Started copy of C:\windows.old folder to NAS Device (\\DL4100\Public\windows.old)
8:32 AM Reports 13% complete, 46786 items remaining, 5 seconds remaining (8.81 GB)
8:41 AM Reports 99% complete, 71 Items remaining, 5 seconds remaining (32.1 MB)
8:50 AM Reports 99% complete, 0 items remaining, 5 seconds remaining (0 bytes)
8:52 AM Reports 99% complete, 0 items remaining, 5 seconds remaining (0 bytes) - different filename than before
9:10 AM Reports 99% complete, 0 items remaining, Calculating remaining time - different filename than before
9:12 AM Reports 45869 File Conflicts, all with same Date and Size, I chose Skip
9:28 AM Finished:
Destination Folder contains 92560 Files, 18020 Folders, 19,947,816,261 Bytes (18.5 GB)
Source Folder (windows.old) 85727 Files, 17564 folders, 18,669,898,458 Bytes (17.3 GB)

Never had anything like that with any other Windows Version, any ideas ?