I guess this was split from some other discussion? Because of that there's no context. So I can't really offer much help, even though I think I'm pretty good at RM&C.
What I can offer: When you use RM&C, it ONLY operates on the files that MC has imported. Which are generally the audio files. The art work and extra files (PDF, etc) are not transferred or copied, etc. UNLESS you check the box in the upper left that says "move all non imported files in folder with selected media files". If you check that box ABSOLUTELY everything in the chosen directory(s) gets copied/moved. Be certain that this is what you want to do before using this option.
Also: It's smart to have your cover art stored inside the media files if you can. FLAC supports this and I recommend that you embed your cover art if the file type supports it. Or possibly use MC's central directory for cover art. I personally don't like that option, but it eliminates another variable when moving things around. Again I have zero idea of what you were trying to do, so this might not be useful.
Finally, your screen shot is very, very small and I can't read anything on it. So I can't get any clues from that either.
Good luck.
Brian.