Samd51 Thing Plus External Flash access

Hello,
Has anyone been able to get the 25sf041 on the Sparkfun samd51 thingplus to work for saving files? I am trying to get the spiflash library to work but getting errors of various kinds.
I would like to use this nice 4 mbyte flash chip to save data logging for later retrieval to avoid the mass and complexity of adding a microsd board.
Thanks for help in advance.
DrC

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