Access to the anytunes files and type of conversion

Hi everybody, sorry for my english, i'm french

i'd like to know how to access to the files and library when anytunes copy during importation, i tried to open the app files in the finder but there is nothing except pref etc... i'd be reassured if i can see and access to the files... cause when i import in anytunes, after i delete from my mac

other question, i'd like to know what is the quality when anytunes copy a file, does anytunes do a duplicata ? or does anytunes convert the files in mp3 for exemple

THANKS a lot for your answers guys.