guys i think you got some information for me thank you , but you seem that you didnt understand me well, in the mmc card i have lots of files i want the micro controler to select on of them and read it as bytes then send it some where else. but i got benifits of you replies things i never knew before, i have been working in microcontrolers for long time but never been in a task like this ( reading a windows text file ). it was a pretty hard one - i will stay waching this thred hope you all work with me to achive it, it will be a benifit for all all for one and one for all. thank you once again.