including subfolders.
All files are mp3 encoded, no copy protection.
I have read that the drives will recognize 2 gig cards and up to about 500 files though the manual suggests a 128mb card limitation.
What is correct? Advice?
07 S4 Cabrio

What kind of card are you using and what kind of writer to put the file on the card?

I use high speed SD cards up to 4GB and the all work fine with up to 500 items per media.

installed but I don't know as it is my wife's car and she has it with her
As for cards, I use SanDisk 2.0 GB cards. These are not the "Ultra" cards built for high speed data transfer .
I use a Sony VAIO laptop which has a memory card adapter slot that can take multiple cards. The card is recognized as drive F without a problem and read / write des not seem to be an issue. I have made sure there are no hidden files lurking around and getting counted

I know that some people had problems with cheap cards, strange ID tags, long file names or special characters in file or folder names. The SanDisk cards (any type) usually work fine so I doubt that this is the issue.

To check if the ID tags are causing the problem, take one of the folders that displays properly and move it to your hard disk, then format the card FAT32 and copy the folder back, once done duplicate that folder until the card is full and see what happens. You can also try to duplicate the folder on your hard disk and the copy all the folders in one batch to the SD card.

If you get more files/folders visible that way then the issue is most likely the way you ripped the other songs.