Review on SanDisk 256GB SDXC Extreme Pro Memory Card Twin Set (SDSDXXY-256G-GN4IN) 4K V30 UHS-I Class 10 Bundle with (1) Everything But Stromboli Combo Reader by Carron Goebel

I bought Lexar 633x cards with an advertised speed of 95MB/s but that speed was for read speed only! the actual write speed was around 20 MB/s. too slow (almost useless) for professional - hard - work. So I went for these Sandisk cards and the difference was like night and day. Period. These cards are very reliable and quickly empty the camera buffer.