In article , Tim Conway
wrote:

Along with what nospam just said, just do the math: RAW has maybe 15-20 MB
files. JPG has 4-5 MB files. RAW is starting with a lot more data.

file size doesn't mean much.

what matters is if the file has more information, which raw does. jpeg
is lossy and it throws out information.

anyone can pad a file to make it larger or compress it to make it
smaller.