Within the sd model, there are three different sizes of memory cards -- the largest, sd, the mid-sized cards, microsd, and the smallest cards, minisd.
N'ime ụdị nke SD, e nwere ụdị okpukpu atọ dị iche iche nke kaadị ebe nchekwa - ndị kasị ibu, SD; obere kaadị, microSD, na obere kaadị, miniSD.