How to retrieve a file written in the flash memory of a Seeed nfr52840 Sense card?

I’m trying to save a file on the flash memory of a XIAO nrf52840 Sense.

I tried to execute this code :

It works right but I can’t retrieve the file stored in the memory. I can see the card which appears as a drive in windows explorer, but there are only 3 files (always the same) : CURRENT.UF2, INDEX.HTM and INFO_UF2.TXT. I’m not a expert of programming and maybe there is something I didn’t understand! Please can someone enlighten me? Thanks a lot

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those 3 files are the boot loader , not what you are thinking. Look for the SDfat or flash specs for more info.
HTH :slight_smile: