Sony XQD G Series 400MB/s 128GB Memory Card (QDG128A/J) Read 400MB/s and write 350MB/s speeds Supports EB Streaming between card and Sony camcorders enabling constant 2 way communication and insuring stable recording while avoiding speed degradation Compliant to XQD Format Version 2, both PCI Express Gen.2 and USB3.0 interface are supported on a newly developed controller for high performance. 128GB model allows up to 40 minutes of 4K XAVC Intra 422 60p (600Mbps) recording with Sony's 4K video cameras. Packaged with dedicated G Series USB card reader Available in 32, 64 and 128GB capacities.