Excellent explanation, thank you Paul. I deleted my SdFat lib as you suggested and the Fs.h warning dissappeared. (I'd previously replaced File with FsFile, based on TFTLCDCyg's earlier post ... easy indeed).
I looked at some of the TD SdFat...
Ahah, knowing that history helps heaps, thanks. I've got some reading to do (e.g. on meaning/purpose of SDIO)
I'd still like to know the reason behind the first warning message about about FS.h? (in my original post) It seems to happen with all...
Ok I did those code changes (plus a few more, mainly File->FsFile) and it now compiles, thanks @TFTLCDCyg
What is relationship between SdFat and SdFat-beta libraries? Prior to compiling I manually dowloaded SdFat-beta ZIP from GitHub and put it...
I have a number of sketches I wrote for my T3.5 & T3.6 back in 2017. They all successfully read &/or wrote to the SD card using the SdFat library by grieman (which, based on my sketch comment, was a beta release) using this code snippet...