px-716A reads disc size wrong

I’ve upgraded my firmware to 1.06 and upgraded plextool also. And still when i load a disc and go to “my computer” to check the disc capacity it only tells me i’ve got 4.38 gigs instead of 4.7gigs.

so whats the prob its the right size

with only 4.38 showing i can not get a full 4.7 burn completed

thanks now i get it