https://devzone.nordicsemi.com/f/nordic-q-a/122691/how-to-not-use-exteral-flashHi,the Nordic team. I am using nrf54L15 to develop Matter. I have seen that the official sample programs are all equipped with external flash. How can I run Matter programs without this external flash? The &quot;template&quot; I currently use.en-USTelligent Community 13Fri, 04 Jul 2025 05:49:28 GMThttps://devzone.nordicsemi.com/thread/541397?ContentTypeID=1Fri, 04 Jul 2025 05:49:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:41b14a96-999f-454b-9ce3-2380d726e30dliisa<p>Thank you very much.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/541300?ContentTypeID=1Thu, 03 Jul 2025 09:32:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7231ac14-836b-485a-9b60-e7119eb09a42SwRa<p>Hello,</p> <p>On the nRF54L15, you can run Matter without external flash and<span>&nbsp;use only the internal RRAM (flash) for both the running firmware and the new firmware image during Device Firmware Upgrade (DFU). This is explained here:&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/matter/template/README.html#matter_template_using_only_internal_memory">https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/samples/matter/template/README.html#matter_template_using_only_internal_memory</a>&nbsp;</span></p> <p><span>Please also see check out this thread:&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/f/nordic-q-a/120674/do-nrf54l15-matter-applications-require-external-flash-for-ota-updates">Do nRF54L15 Matter applications require external flash for OTA updates?</a>&nbsp;</span></p> <p><span>Best Regards,</span></p> <p><span>Swathy&nbsp;</span></p><div style="clear:both;"></div>