Okay so heres my problem I hold all my music in different folders on my desktop labeled different genres for each folder ex: "rap folder "house folder" etc. I changed the name of the folders so i can be more specific for each genre and now in my collection it says all my music is missing. In my playlists on rekordbox it says theyre still there because i changed the name of the folder back and they all seem to be back to normal but in my collection its trying to reanalyze every song and it says that theyre all missing with a "!" next to it. below is a picture: so the right folders are where i hold my music and the ones i changed the name of when they went missing. I changed them back and the playlists in rekordbox on the drop down menu on the bottom left side you can see where they names sorta match the folders on the right. So after i changed the names back the songs appeared but as i said earlier in collection it still says all my files are missing as u can see. sorry if my thoughts sound so jumbled im having a hard time explaining it because i dont know what went wrong. Can someone please help me. 
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Hi Kyle,
The first problem was you changed the source name - the file was missing the folder it was in couldn't be found. Changing it back made it available again.
Did you possibly import the songs a second time after they were missing (after the rename)?