https://devzone.nordicsemi.com/f/nordic-q-a/62401/fds-write-read-backDear Sir, Using SDK 16.0 for NRF52833. My application uses NRF FDS lib (flash data storage) Immediate fds read after fds write gives 0. But after a board reset I get written data This is the expected behavior? Regards, Lakshmien-USTelligent Community 13Thu, 11 Jun 2020 11:16:37 GMThttps://devzone.nordicsemi.com/thread/254452?ContentTypeID=1Thu, 11 Jun 2020 11:16:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ffc0ef7a-e4e6-4bfe-bcdc-a2790b32ed3cJared<p>Hi,</p> <p>The FDS module is a ansynchrouns module, which means that the operation hasn&#39;t necessarily been executed when the function returned but only scheduled. You would have to wait for the FDS_EVT_WRITE event to be generated for the write to have been completed.&nbsp;</p> <p>regards</p> <p>Jared</p><div style="clear:both;"></div>