Every time our phones reach capacity, I download all pics/video to my laptop. Then I plug in a portable SSD and copy them there in folder name "media until ". When I get to work next, I copy them to an identical portable SSD stored there, at which point I free the space on my laptop. This whole process happens about 3-4 times per year.
I'm currently using returned/refurbished Samsung T5's at about $100/TB.
I do this, alongside a tool for finding duplicate files: https://github.com/adrianlopezroche/fdupes.
I use Czkawka recently for dupes (it has GUI and well-maintained): https://github.com/qarmin/czkawka