I just received an X-T4 as a gift and tried using a couple of new Transcend V90 cards with it.
https://www.bhphotovideo.com/c/product/1431179-REG
The first one is completely dead. The second recorded stills, but when I tried to import, 18 out of 40 images failed to import into Lightroom. When I looked at them in the finder, they don’t have any data in the files
I’ve head great success with these cards in my Panasonic LUMIX bodies.
What cards are you all using with success?