Creating proxy files on ingest is something you will REALLY need on a small 8GB RAM laptop!
Especially if you're working the 4k files of any drone, phone, DSLR, or other 'device', almost guaranteed that's the long-GOP stuff that is the hardest media on a CPU for playback created. Efficiently written to small space fast on the 'device' by specialized chips, but ... there's only a real compressed I-frame every 9-120 "frames", as in between there are data-sets written referring to pixels that either have changed since the last I-frame or will change before the next I-frame ... or both! These are called p & b frames. The standard practice was a distance of 9-15 frames between I-frames, then extended to 9-30 frames, and some rigs now use 'partial I-frames' to extend the full I-frames up to 120 frames apart.
The CPU has to store the I-frames to RAM, and recall them to compute the rest of a frame from one or more datasets. Nasty load they place on things.
You should use the included Cineform preset for your proxies, and yes, it WILL take some time on that small computer, so you might want to run them overnight if you've got a bunch. Editing however will be much smoother.
DON'T use H.264 proxies, I don't even know why that preset's included.
Neil