Why when I insert desk in flloopy disk and open he told me that is not accesble
No ID address mark was found on the flppy disk?
Help pleas

Could be the floppy has been damaged, could be heads are out of alignment, could be a couple of other things.

Try it in another computer... if you get same result you've more than likely lost whatever was on that floppy

Try other floppys to see if same results or is this only floppy?

Are you trying to view the floppy through windows explorer?

When did it work last?

A list of any changes that either happened or that you perhaps made to your computer around the time that the problem started; particularly any software or hardware that you installed or setup.