Can you post a link to the SD card adapter? There is a fairly common design that has an error where the MISO line is not properly released. See this discussion for a bit more detail https://forum.arduino.cc/t/spi-sd-card-reader-other-spi-device-not-working-together/447006 there is a different modification that leaves the buffer in place but connects the enable pin for MISO to the CS line, unfortunately I can't locate the details for that at the moment.
1 Like