isn't there a music folder to copy the files to?

Nothing in the manual is helpful with this. I only want to copy a bunch of MP3 files from my PC to the Nokia 5310. Maddening because I did it before...somehow. But now I can't make it happen again. I tried this: Selected all files in File Manager on the PC, and then Control-C to copy them. Then I put them in "Gallery" on the Nokia but none of them show. I was playing another bunch of MP3's that appeared in Gallery/Music, and those were the files I copied once before, somehow. I've since deleted them. By the way, I have no use for Playlist or "All Songs" because they play perfectly from Gallery.