Thank you very much, but I just found solution see post number 8:
http://community.casiocalc.org/topic/6874-os-error/
I'm sorry about I forgot write about.
Thank you again.
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...