SD 0 Single Density Simple Densidad 1997-05-04 floppy diskdisco flexible, disquete, [floppy] single densitydensidad simple 1 Secure Digital Seguridad Digital 2018-11-02 Secure DigitalSD Secure Digital eXtended CapacitySDXC Secure Digital High CapacitySDHC Secure Digital Input OutputSDIO Secure Digital Standard CapacitySDSC