SDK 15.3 USB MSC can not modify file in pc.

[pyh0603]

Hi.

    I use SDK15.3 (PCA10056 NRF52840) USB MSC example.

    i can enumerate disk, creat file and delete file. but  i can not edit file. 

    When I edited the file, re-plugged the USB and opened the file I just edited again. pc display file does not exist. The content I just edited does not exist.

    

    wait for help.  thank you.

    

[Turbo J]

Looks like you used the example that just puts the data in the controller's RAM (G: is only 170KB).

This will of course vanish when the power is turned off (or the MCU was otherwise reset).

[pyh0603]

Thank you for reply.

i  puts the data to the extern flash.

Looking forward to further reply. thank you.