I am trying to retrieve a file from a *disk* and it won't open.
I am getting a warning that says ..."the disk is not formatted or it's formatted for a McIntosh". Or the warning says ..."A: is not accessible - disk media not recognized - disk may not be formatted"
I've tried other disks and they work.
I have used this *disk* before. It might be full. Is that a problem?
Ooh, floppy disks! I remember them.
The fullness of a floppy disk drive is only of concern when it comes to saving anything on them due to the limited amount of capacity that they hold. Back when it was all fields around here files were so small you could fit hundreds of them on a floppy.
Does this disk work on other machines with floppy disk drives?
If the disk doesn't work on other machines then the disk is scrap (probably a sector 0 failure) and you've lost everything that's on it. Sector 0 on a floppy disk basically tells Windows where everything is on the disk (by what's called the table of contents) and if that's damaged the entire disk is worthless and if Sector 0 cannot be formatted the disk is toast.
With all due respect, why are you still using floppies? Would you not be better looking at flash memory/pen drives/pen sticks that hold the equivalent of about 1500 floppies?
Floppies may still be available but they're so unreliable, so bulky and they're easily damaged, with copious legends of students in schools of yesteryear carting them around in their back pockets, sitting on them, bending them and then wondering why they (the disks) don't work.