In theory there is and API for the Multimedia Card:

http://www.symbian.com/developer/techlib/v70docs/sdl_v7.0/doc_source/reference/cpp/MMCSDCard/index.html

But I could not find any header files for these classes!

Other solution could be the RMmcCntrlIf class defined in d_mmcif.h but I am unable to find any docs about it. I have tried everithing but all of my tries resulted in a crash or a got an error code. Ahh. Pleas help if u can!