I know it's an old question, but I couldn't find many answers - maybe they were in the old IDI-forum.

Should I separate my raw and jpg-files in two different folders?
I use the directory structure Top->1980->1981->01 (Top->decade->year->month) as my pictures are mostly old. Almost all pictures are in two files from the scanning company or from the camera - raw (or tiff) and jpg.
- Should I separate the raw/tiff and jpg in separate folders?
- Which type should be in the subfolder?
And another issue:
- After importing and cataloging the files, should I make the raw-versions read only?
Thank your for your help.