https://devzone.nordicsemi.com/f/nordic-q-a/10658/data-storage-with-mesh-workingAs here said link1 If we want to use flash in the mesh we should ignore APP_ERROR_CHECK(NRF_ERROR_INVALID_STATE) in ts_sd_event_handler() , 2.And here link2 tell us that flash operations take long time, we can complete them througth (1)call sd_radio_session_closeen-USTelligent Community 13Fri, 29 Apr 2016 01:49:08 GMThttps://devzone.nordicsemi.com/thread/39781?ContentTypeID=1Fri, 29 Apr 2016 01:49:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:65edfddf-b33b-458e-a1ad-7d42479c38a8Jacksonlv<p>Hi lkhsnow,I am doing the same thing and if you fixed the question?Can you tell me how ?</p><div style="clear:both;"></div>