I have been told that on RS4 Models the maximum capacity of SD card is 4GB. So I bought a 4GB card, put a bunch of MP3 songs on it and insert it in SD1 slot. The message is "Reading SD Card", but it never stops and allow you to play anything?!

Does anyone know what the problem is?

 

While the card reader can support SDHD, the flash memory in our 2006 technology US RS4s is only 2 GB per card. I have various size cards, but know not to put more than 2 GB on them.