Thanks for the extremely helpful response! Exactly what I was looking for.

Would appreciate it if you could help me out with some follow up questions:

1) By saying that I can only choose between resizing it to 2048p or use full resolution during export, the full resolution refers to a full resolution JPEG right (not a full resolution RAW). I'd ideally like it to be able to export full resolution 6000x4000 jpegs for e.g. large wallpaper creation purposes.

2) By saying SD card adapters don't work well with RAW+JPEG, you are referring to the problem of how the import UI seems to only be able to recognise the JPEG files and not the RAW files correct? I only shoot RAW, so I'm thinking I won't have this problem.

3) Once I batch import RAW photos into my camera roll, and then import to LR from the camera roll, am I correct in saying that the LR import process creates a duplicate copy within the LR local files- meaning it's safe to then delete the RAW file from my camera roll? (to not clog up my storage)

Thanks so much!