@zudn Me and my dad both found different solutions to this same problem. His choice was more expensive, mine... well you probably wouldn't consider it 😶.
Do you mind answering what size you have and what takes up so much space (besides the OS)?
If yours has an internal SD card reader, you can delay the inevitable by getting a flush, in-slot microSD adapter to offload files/infrequent programs into. (If formatted to apple's filesystem, time machine will backup it).
@zachdecook Last year I did some video. I have deleted quite a few. With my previous MacBook, I never maxed out the memory. See image for size and what is taking up space. I think I do have the internal SD card reader.
I have an external drive that time machine backs up. If I delete stuff from the MacBook, will the next backup delete it from the external drive?
Thanks!