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  1. Thanks for the reply. I am using TD 1.53 with...

    Thanks for the reply. I am using TD 1.53 with the Arduino 1.8.13 IDE.
    SD cards are new, formatted for Fat32, and work fine in a PC with a USB card R/W.
    Power is from the USB - no external. Seems...
  2. Intermittent SD initialization with Teensy 4.1

    I am using the built in SD card on the Teensy 4.1, and it frequently fails to initialize with SD.begin. Sometimes it works and sometimes it doesn't.

    chipSelect is set to BUILTIN_SDCARD
    ...
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