Robocopy sees differences in files even when there are none BUG
Edit: Is this taken seriously, or did I post it at the wrong place? I hope I did not waste my time trying to report a bug in a widely used tool. Files have same time to the second and same content to the byte, the only thing is that source is a network drive. Does Microsoft not intend to fully support network drive as source? Edit 2: I dropped robocopy completely and found a quite good alternative: https://freefilesync.org/. After a small donation, it even supports multithreaded copying. Not a command line tool unfortunately, but at least it is able to know when files are similar and it doesn't copy them again each time. When I copy files from my network drive to a local folder and immediately re-run the command, all files are copied again instead of being skipped like they're supposed to. robocopy "\\network\Document\Migration" D:\Migration /S /FFT Please see my superuser question for more infos https://superuser.com/questions/1733527/robocopy-from-network-drive-doesnt-skip-duplicates. I searched elsewhere on the web and found that some german person in 2013 had the exact same problem - no issue was found https://www.synology-forum.de/threads/robocopy-sieht-identische-dateien-als-geaendert-an-fft-hilft-nicht.41341/ I don't know if this is linked to https://social.technet.microsoft.com/Forums/en-US/6eba1f81-8666-42ce-9aaa-e9cf8814c64f/robocopy-problem-under-windows-8 I am flabbergasted that robocopy cannot be trusted to do this so basic thing which is comparing 3 things: name, date and size. More so that the switch that was created for this purpose /FFT does not work for me. Is there a way to see WHAT differences robocopy sees between the files? Because according to robocopy "\\network\Document\Migration" d:\migration /l /ts /nc /ndl /njh /njs /FFT All files are similar (same date) and `fc` shows that there are no differences. 0 2022/07/25 11:31:55 d:\migration\file 1.txt 0 2022/07/25 11:32:06 d:\migration\file 2.txt 0 2022/07/25 11:32:18 d:\migration\File 3.docx 0 2022/07/25 11:31:55 \\network\Document\Migration\file 1.txt 0 2022/07/25 11:32:06 \\network\Document\Migration\file 2.txt 0 2022/07/25 11:32:18 \\network\Document\Migration\File 3.docx (If you pay close attention, this result from the command above in and itself is wrong, as I didn't include the "/IS" switch that enables same files. Same files should not be displayed at all)