https://devzone.nordicsemi.com/f/nordic-q-a/36547/calling-flash-data-storage-fds-api-from-within-fds-event-handlerHi, Does FDS event handler run within interrupt context ? Can another FDS api be called from within the event handler (i.e. - calling garbage collector from within event handler if write fails), or should it be deferred call from &#39;main&#39; contexten-USTelligent Community 13Mon, 23 Jul 2018 21:50:44 GMThttps://devzone.nordicsemi.com/thread/141051?ContentTypeID=1Mon, 23 Jul 2018 21:50:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f98efc0b-dd84-4498-9cb3-4230934b30b7Hung Bui<p>I don&#39;t think it would be a problem unless you calling the fds command from an APP_HIGH interrupt handler because it will later call softdevice SVC which can&#39;t run from App_HIGH. If you calling it from the fds event, it should be fine, as far as I understand that event is on SD_LOW.</p><div style="clear:both;"></div>