How to drastically reduce the size of files?

Hi, I'm trying to empty an sd card because I need it for another device, I wanted to put the files on my computer temporarily but the files exceed the available space on my ssd. I assumed I could just make a zip with the default windows tool but, after waiting 6h for it to finish, total size went from 81go to 80.8go... I was about to start winrar but it estimated around 5h and I'd rather not let this run all night for something that might be yet another disapointment. The files are mostly just photos and videos, I need them to go from 81go to under 60go. Would winrar be enough? Would another tool be better suited? Or is the type of files the issue and these just wont compress?