Received the Kingston Canvas Go! Plus 256gb sd card now. Same results basically. It only works in 160MHz overclock for me, and gives benchmarks with read and write at about 59 MB/s, both in normal and play mode, so this is actually a bit worse. My Sandisk Extreme Pro 64gb works in 240MHz but the benchmarks in play mode are 92/86/69/85 and 58/70/62/70 in normal mode. I am using build Nightly.2022Oct06.EOSM202. It also says "Mercurial changeset: 8a324688dbad" in the help folder, if that is relevant. Replacing with Bilal's module changes nothing. Just to see if I have done something worng: First I used low level format on card in camera, then I put the files from Dannes build in root of card, then I ran firmware update with card in camera.