Got a system where I am still rebuilding a Windows 10 filesystem after a data loss.

Backups included:
- 1. A data backup made back in August. Due to the nature of the backup software - Carbonite cloud storage - not all files were saved.
- 2. Data recovery off the failed drive - all files were saved, with the original timestamps - but some may be corrupt. Drive had been accidentally formatted by the user.
- 3. A data drive snailmailed from the cloud storage provider. Due to the nature of the backup software - Carbonite cloud storage - not all files were saved. The file and folder timestamps were all changed by the cloud storage provider - accidentally? - to the day of the restore to the data drive.

I first received 3. and restored it into place, then I copied 2. on top of it, planning on waiting for 1. to fully download and restore.

So now I have fully received 1.

So I think what my plan is, is to overwrite my data restore by moving files from 1. in every situation where the file checksums match source to destination. Newer, or older, that should restore the original timestamps, which is desirable.

Anything left in 1. will then be situations where the checksums now differ, bearing further investigation. If the checksums differ and the file timestamp is significantly newer on the destination, then it's likely that file has since been edited. If not, further investigation.

The problem is, how to do this on this Windows 10 box. I thought robocopy might do the trick, but robocopy seems only to significantly follow timestamps, not checksums.

Anyone have any ideas as to how to proceed?