Hi, I created an issue in the M5GFX repository. Big kudos to @lovyan03 for providing a very fast answer and solution. For me the solution for an M5Stack CoreS3 is to add an include for <SD.h> #include <SD.h> #include <M5CoreS3.h> See M5GFX issue #79 Error: cannot declare variable 'file' to be of abstract type 'lgfx::v1::DataWrapperTfs::SDFS' for reference.