Explicit SdFat

platformio.ini

 src_filter     = ${common.default_src_filter} +<src/HAL/SAMD51>
 lib_deps       = ${common.lib_deps}
   SoftwareSerialM
-  Adafruit_SPIFlash=https://github.com/adafruit/Adafruit_SPIFlash/archive/master.zip
+  Adafruit SPIFlash
+  SdFat - Adafruit Fork
 debug_tool     = jlink
 
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