https://devzone.nordicsemi.com/f/nordic-q-a/94254/external-flash-not-working-with-simple-example-on-nrf9160dk-1-0-0Hi, I have a very simple example which just enables the SPI flash on the nrf9160 and then tries to mount littlefs on it. Unfortunately, it doesn&#39;t seem to be working on my nrf9160dk 1.0.0 (it definitely has the flash chip on it, I can see it! theen-USTelligent Community 13Fri, 25 Nov 2022 11:57:04 GMThttps://devzone.nordicsemi.com/thread/397618?ContentTypeID=1Fri, 25 Nov 2022 11:57:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4b27a87e-1574-4f93-9493-8e6f4956c09ejeremyherbert<p>I found my answer in the docs:</p> <ul class="simple"> <li> <p>If the external flash device is not using the<span>&nbsp;</span><a class="reference external" title="(in Zephyr Project v3.2.99)" href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/build/dts/api/bindings/mtd/nordic%2Cqspi-nor.html#dtbinding-nordic-qspi-nor"><span class="xref std std-ref">QSPI NOR</span></a><span>&nbsp;</span>driver, you must enable<span>&nbsp;</span><a class="reference external" title="(in Kconfig reference v&amp;nbsp;)" href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK"><code class="xref kconfig kconfig-option docutils literal notranslate"><span class="pre">CONFIG_PM_OVERRIDE_EXTERNAL_DRIVER_CHECK</span></code></a><span>&nbsp;</span>to override the Partition Manager&rsquo;s external flash driver check, and the required driver must also be enabled for all applications that need it.</p> </li> </ul> <p>The nrf91 does not have a QSPI interface, so you need to disable this check. After adding this to the prj.conf, it is all working!</p> <p><a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/scripts/partition_manager/partition_manager.html">developer.nordicsemi.com/.../partition_manager.html</a></p><div style="clear:both;"></div>