Hi to all. I'm sorry for my english, but I come from Italy. My CASIO fx-9860GII SD calculator see the text files who I put near its SD, and I can copy they on main memory, but I can't open they to read! How can I read the text files by the calculator? Must I use a particular software to convert text files before I put they on SD? Now I'm using ".txt" files. Please help me because I need very soon! Thank you very much.