Proprietary physical storage goes brrr

Are you sure that wasn’t more recent?
Unless I’m thinking of the PS vita

That’s a psp it says it on it
Plus the vita as more rounded on the sides
Me and hubby had one of each

I can’t remember which is which, and can’t be bothered to

Yup, 5.25 inch diskettes had a notch for write protection, if you cut out a second one, you could reverse the disk and use the other side.