I'm not exactly backing up but its a similar idea.
I have a few archives on my computer. They have exact copies of certain files (mostly 300k to 1.5MB). It's enough to take up a gigabyte. I am using Duplicate Cleaner. It has an option to use hardlinks. I plan on never modifying the file and they are all on the same disk (external 1 partition).
Should I use hardlinks or is there a problem I don‘t foresee?