I was not able to upload files in SPIFF format to the Unexpected Maker Feather S3 in the Platformio IDE – I was trying to enter the example code from the Build Web Servers book. It would upload the code just fine but not the related files in the data directory. I finally figured out it was not creating the correct partitions on the device. I added the following lines to the platformio.ini file to resolve the problem.

board_build.flash_mode = qio
board_build.f_flash = 80000000L
board_build.partitions = default_8MB.csv

Hope this information is helpful to others. The UM Feather S3 is a very powerful and low cost board, but documentation is sparse.

Hi Tom.
Thank you so much for sharing that tip.
To be honest, I’m not familiar with that board, but I’m sure this information might be very useful for those using the board.
Thank you.
Regards,
Sara

Here is a pointer to information on the board.  It has a lot of features for its $22 price.  http://www.feathers3.io

Looks great.
Thanks for sharing.
Regards,
Sara