https://devzone.nordicsemi.com/f/nordic-q-a/119756/problems-configuring-mcuboot-to-use-external-flash-for-secondary-partitionI am using the solution for this exercise to have MCUBoot use the nrf5340dk&#39;s external flash for the secondary partition in my own project. I have done the following: 1. copied the &quot;sysbuild&quot; directory and &quot;sysbuild.conf&quot; to my project. 2. added theen-USTelligent Community 13Thu, 13 Mar 2025 13:30:08 GMThttps://devzone.nordicsemi.com/thread/527176?ContentTypeID=1Thu, 13 Mar 2025 13:30:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2c39692f-3682-4348-b8aa-dd876ac9d966Menon<p>Hello,</p> <p>Are you using QSPI or SPI here? The log shows a warning. I recommend sharing the entire log while building. Have you checked<a href="https://github.com/NordicDeveloperAcademy/ncs-inter/blob/main/v2.9.0-v2.7.0/l9/l9_e3_sol/qspi/prj.conf#L31"> the <code>prj.config</code></a>? You need to enable some configurations when using external flash. I suggest trying the <a href="https://github.com/NordicDeveloperAcademy/ncs-inter/tree/main/v2.9.0-v2.7.0/l9/l9_e3_sol">solution first</a> to see if it works well.</p> <p>Kind regards,<br /> Abhijith</p><div style="clear:both;"></div>