【Note】The CFexpress 4.0 Type A Memory Card requires a CFexpress 4.0 Type A card reader for optimal read and write speeds. This product does not include the CFexpress 4.0 Type A card reader. Please buy the card reader separately(Asin: B0FF4ZFGXY) 【Fast-Speed, High-burst RAW images and 8K Video Recording】— Up to 1600MB/s write and 1780MB/s read speeds for the most advanced use cases of professional content creators including fast burst RAW image sequences and high bitrate video recording up to 8K, perfect for the professional filmmaker or extreme action photographer who wants to speed up their offloads dramatically 【Latest USB4.0 interface】Next-generation memory card utilizes the latest USB4.0 interface, offering blistering read 1780MB/S and 1600MB/S write speeds that can handle even the most demanding 4K and 8K video recording, as well as rapid-fire burst shooting of high-resolution RAW images. /S and 1600MB/S write speeds that can handle even the most demanding 4K and 8K video recording, as well as rapid-fire burst shooting of high-resolution RAW images 【Work Up to 2x Faster】— Pergear Cexpress 4.0 Type A memory cards utilize the latest flash memory technology to double the speeds of Pergear CFexpress Standard cards while remaining backward compatible with existing devices. Fully compliant with the CFexpress Type A 4.0 specification and meets Type A 2.0 standards 【Compatible with Sony Alpha and FX cameras】— A7IV（ILCE-7M4(A7M4)；A1（ILCE-1）； A7SIII（ILCE-7SM3）；A7RV（ILCE-7RM5)；A9III（ILCE-9M3）；ILME-FX3；ILME-FX6；ILME-FX30 Pergear 256GB CFexpress 4.0 Type A Memory Card