Changes
Add dimensions.
Capacity is 180 Kbytes per side (the discs can be flipped to access the other side, giving a total of 360 Kbytes per disc).
Dimensions are 80x100x5mm. (more or less, depending the manufacturer)
(This article, [[:File:Amstrad Computer User8504 072.jpg]], also mentions something called Hitachi HFD-2 discs.)