Mini Digital Photo Frame

how do you put pictures on Mini Digital Photo Frame key chain?
i found a 1 inch mercury photo Digital Frame key chain i plugged it into my laptop and connected it i was able to take pictures off of it but when i dragged pictures to the folder file thingy on my computer it said “please insert a writable disc into drive D” um i have no clue what that means and when i clicked on its like program thing where i was able to take the pictures off i wouldn’t show in the computer icon where you’d find a picture folder to get pictures it didn’t show the picture folder at all so you’d what to do
thanx
btw i only found the frame thingy no cd nothing
It might be full. Maybe try deleting images off it. But those digital key chains things are cheap pieces of crap so it just might be broken.
Comparison between Iphone, Ality 3.5″ Moderna Mini Digital Photo Frame