I use either a simple copy or Teracopy to make a backup of my Users folders from my D: drive to an external disk. I then use Winmerge from time to time to keep the backup up to date. I know there are other tools but this simple way works quite well.

When I make the initial copy, some of the files on the external disk keep the original datestamp and some have the current date/time and there seems to be no obvious rational for which do and which don't.

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I have seen some posts around the web that say you need to use a specific copy tool but I know that in the past it has worked perfectly although it could have been on any Windows version from XP to 10. The machine I am using currently in running Windows 8.1 Pro.