This page explains options quite well:
https://superuser.com/questions/814102/robocopy-command-to-do-an-incremental-backup

Copy folder modified date
/DCOPY:T

Copy in Backup mode, which copies all files, and bypasses many permission issues
/b

Backup Onedrive quickly
robocopy /mir /xj /w:0 /r:0 "C:\Users\user\OneDrive" "Z:\OnedriveBackup\Onedrive" /copyall /LOG:C:\Users\user\onedrive.txt /mt

Move files from one folder to another. This basically just moves all files from source to destination, but will not delete any files in destination. You can use this to periodically move all files in Source, and they will collect in Destination.
robocopy /S /E /DCOPY:DA /COPY:DAT /MOVE /XJ /R:0 /MT "C:\Source" "C:\Destination"