Hello! I am really not tech-savvy and I haven't been able to find a resource to help. As a matter of fact I am so tech-unsavvy that I'm not even quite sure how to phrase this question (so pls be nice)
I like to backup all my iPhone photos as well as other stuff (ex. school slides) onto a 1 TB spinny hard drive. Within my hard drive I organize things in folders (which have subfolders) etc...
I recently purchased a non-spinny hard drive given that the other one is old (and I just thought it would be good to have everything saved onto two hard drives). I just copy pasted everything on my old hard drive on the new one (took about an hour).
As I have started to add new things to my new hard drive, I realized I have no clue how to keep the old one up to date without having to re-copy and paste everything from my new hard drive back onto my old hard drive. I feel like as I accumulate more and more stuff, it will take longer and be harder to do.
TLDR; Is there a way to just download the difference between two hard drives onto a new hard drive? Any help (esp in a "for dummies" way, with detailed steps) would be greatly appreciated