Sony 64GB XQD Flash Memory Card – G Series QDG-64A (Read 400MB/s and Write 350MB/s) with USB 3.1 (Gen1) XQD USB Adaptor Price: £314.00 (as of 09/04/2023 19:35 PST- Details)

The Sony XQD G Series is capable of up to 400 MB/s read speed & 350 MB/s write speed giving you the speed needed for seemless 4K Video
Offers Dependable Recprding of 4K video while avoiding speed degrdation.
Available in 32, 64 and 128GB offering up to 40 minutes of 4K XAVC Intra 422 60p (600Mbps)