https://devzone.nordicsemi.com/f/nordic-q-a/103178/external-flash--what-happens-during-programmingHi when I use a Erase and Write in the Programmer app in nRF Connect for Desktop, or when you use &quot;Erase and Flash&quot; on the VS Code nRF Extension, or when you use nrfjprog -e... What happens to the external flash (e.g. in the 5340DK or in the 52840DKen-USTelligent Community 13Fri, 25 Aug 2023 14:22:28 GMThttps://devzone.nordicsemi.com/thread/443196?ContentTypeID=1Fri, 25 Aug 2023 14:22:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a42f1de-179b-432d-9d77-f6a122f0c586Jared<p>Yes, exactly!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/443192?ContentTypeID=1Fri, 25 Aug 2023 13:52:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5da659fe-961c-4299-8f7a-36b594eacdebLorenzo Amicucci<p>Thanks! and I guess the Programmer is still using nrfjprog beneath, right?&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/443186?ContentTypeID=1Fri, 25 Aug 2023 13:40:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:902c7dd7-80b6-4580-8576-15d55f224ee9Jared<p>Hi Lorenzo,</p> <p>The documentation for nrfjprog -e states:&nbsp; <em>-e --eraseall Erases all user available program flash memory and&nbsp;</em><em>the UICR page. Can be combined with the</em><em>--qspieraseall operation.</em></p> <p>Thus, by default it should not delete the external flash unless you add qspieraseall argument as well,</p> <p>regards</p> <p>Jared&nbsp;</p><div style="clear:both;"></div>