How to backup Mac photos to an external hard drive If your images are not all saved in iPhoto or Photos, you can follow these same steps but for step 2, find the folder with your pictures instead.
It’s usually APFS or Mac OS Extended (Journaled).
So, moving them off of your Mac’s hard drive will free up your storage for other things. First, photographs and videos can take up a lot of space. There are a ton of great reasons why you’d want to transfer your pictures over to an external hard drive.
With Gemini 2, you can choose which folders to scan or select your entire hard drive.
But here’s a tip: download Gemini 2 to help you quickly scan for duplicates and get rid of them.