I assume by ongoing, you mean scheduled.
Macrium free will do scheduled backups, but i don't think the free version does differential or incremental backups.
WD and Seagate offer a free download of Acronis through their websites. If your friend has a WD or Seagate drive installed, check those versions to see if they offer scheduled backups.
You can also try other free image software from Paragon, etc.
If you're just looking for ongoing file copies, rather than full images, a batch file using xcopy, robocopy, or xxcopy can do this pretty easily.