@csabanw:

I have various SD cards from 64MB to 1GB, and all are working fine. The key thing is, that the SD could be "partitioned" and some devices are creating not standard partitions on them, which causes problems on MOS (but also in Linux at me). The solution is to reformat the card in MOS. Believe me, if you format the Card using fat95 (the Format command from menu...), every device is going to read your card (I have tried linux, win, mac, MOS, printer, PalmOS, PocketPC, Digital Camera, telephone and mp3 player).