It's A Digital Disease!

The original post: /r/datahoarder by /u/TransatlanticAB on 2025-03-29 11:52:30.

So every month or so i backup some of my laptops contents onto a external hdd for insurance, usually i just delete everything on the external and copy everything over from the laptop but i realise this isnt the best option for the external drives long term health, i change the folders around and add files to them on my laptop so i need software that can "update" my external so it mirrors my laptop without having to delete everything and copy over if that makes sense, im not too computer literate so any help would be much appreciated thanks.