Sony 256GB SF-M series Tough specification UHS-II U3 V60 SDXC Digital Memory Card Card - Read 277MB/s Write 150MB/s SFM256T, SFM256T/T1: Amazon.co.uk: Computers & Accessories
ProGrade Gold MicroSD UHS-II V60 Memory Card and Reader Review | The SSD Review
Integral 256GB UHS-II SD Card V60 Up to 260MBs Read and 100MBs Write Speed 1733X SDXC Professional High Speed Memory Card : Amazon.co.uk: Computers & Accessories