Description. The ProGrade Digital 128GB UHS-II SDXC Memory Card (2-Pack) features a storage capacity of 128GB per card and makes use of the UHS-II bus to support maximum read speeds of 250 MB/s and maximum write speeds of 130 MB/s. This card has also been designed with the V60 Video Speed Class rating, which ensures minimum write speeds of at least 60 MB/s, allowing the card to be used in DSLRs, mirrorless cameras, camcorders, and digital cinema cameras to produce 4K, UHD 4K, 3D, Full HD, and high bit rate MPEG-4 video. It is also well suited for raw photos and rapid-fire bursts.