Review on SanDisk 64GB SDXC SD Extreme Pro Memory Card UHS-II for Sony Alpha a7 III, a7r III, a9 Mirrorless Camera - 300MB/s 4K V30 (SDSDXPK-064G-ANCIN) with Everything But Stromboli (TM) 3.0 Card Reader by Vincent Pavelko

I bought this card because I had a job and couldn't get a 128GB Sony Tough card. Everything works fine until you get to the top two formats and sizes and try to use the A7SIII's built in slow motion, which was a bummer. Not sure if it's Sony's fault or if the card doesn't have enough writing speed, but just something to keep in mind. Otherwise a great camera and as always a great product from SanDisk.