in case anyone has this issue i resolved it myself, after being refused help from apple's technical support for not having apple care and i did not want to pay the charges for an issue created by their program.
If you see this it is probably from the Recovered messages folder found in Mail. it takes mail that wasn't sent because generally of attachments too big to send and tries to send it over and over while just storing it in your computer and this amounts to massive amounts of gb storage wasted.
to get to it you open finder and click on the "go" menu. press option and an option that says "library" becomes visible.
click on Library. then go down to mail. expand it. you will see a sub folder that says "mailboxes" under that again you should find "recovered Messages" you can go into that and delete those files only. they are duplicates of that original e-mail that could'nt send.
you then re-start mail, go to recovered messages on the side. right click and get account info. then unclick "store sent messages on server." that should prevent this issue from happening again..
good luck guys
jeeze. im backtracking seeing what i did and its under library>mail>v2>mailboxes>recovered messages
i noticed these computers are great but any glitch like this can be crippling, when i called i got the guy to tell me the name of the problem then i did the research to fix it myself because i was refused service (thanks apple).
the final cut files should be under media files idk why they would be "other"
let me know any updates, i'll be looking to see what i can find for you.