Exporting 4k raw in maximum quality

I'm using premiere Pro 2020 in windows and would like to know how I can export canon C200 4k raw clips to store for later project use at the same quality as as the source file.
Effectively reducing overall storage and joining usable footage into new files
Filming surfing may result in , for example, 8 mins of footage, 40 second's of which is usable footage.
Ideally I would like to compile only what I have saved to colour grade and correct for a future project.
If this is not possible and for some bizarre reason I'm sure it isn't , what settings/codec/ format should I export my footage in , to retain lossless or maximum quality for use in a project down the line.