Issue Playing mp3's off of a memory card

To add to that, it wasn't even the full song, it would be random clips of the song mixed with other songs. Kept happening, so I deleted everything and started over. I noticed that when I transfer mp3's from my Mac, there is an extra file that is copied over (file name will be the same, but it starts with a period). So my car will flip through the extra files, then finally get to the song (so nothing will play until it gets to track 16 for example).
Anyone have an idea on
1) Why the songs would get copied over like that?
2) What those "extra" files are?
I was guessing that the songs started getting mixed up because I used to delete those extra files, and I would rename the song and leave off the ".mp3"
Any input is appreciated.
Don't forget that the car is Windows based!!!!!!



