https://devzone.nordicsemi.com/f/nordic-q-a/105229/save-log-module-output-to-a-fileHi, We&#39;re running NRF5340 with a 8MB flash attached to it. We would like to save log messages to a file in device memory. We have configured successfully littleFS to work with external flash. I think it should be possible to use a custom backend toen-USTelligent Community 13Wed, 08 Nov 2023 07:41:04 GMThttps://devzone.nordicsemi.com/thread/454583?ContentTypeID=1Wed, 08 Nov 2023 07:41:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:149ba4dc-05bb-43bc-b4a9-78cfcc601b1drunsiv<p>Glad to hear it worked for you. If you could set the post to verfied answear it would be awesome. It could help others if they have the same question in the future.&nbsp;</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/454496?ContentTypeID=1Tue, 07 Nov 2023 14:19:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:93ca7c1f-b2ae-40aa-ac19-11ddd557df67Deus Matei [EMERSON]<p>Thank you ! This worked for me!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/453421?ContentTypeID=1Wed, 01 Nov 2023 07:40:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bc44b07f-3e61-417c-9508-42baa722c6d4runsiv<p>Hi, Deus</p> <p>This should be possible, Zephyr has support for <a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/services/logging/index.html#logging-backends">custom backends</a>.&nbsp;</p> <p>The Kconfig seting&nbsp;<a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/kconfig/index.html#CONFIG_LOG_BACKEND_FS">CONFIG_LOG_BACKEND_FS</a> should be used</p> <p></p> <p>So you will need to set the following in prj.conf</p> <p>&nbsp;<pre class="ui-code" data-mode="text">CONFIG_LOG=y CONFIG_LOG_BACKEND_FS=y CONFIG_LOG_BACKEND_FS_FILE_SIZE= CONFIG_LOG_BACKEND_FS_FILES_LIMIT= CONFIG_LOG_BACKEND_FS_DIR= </pre></p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>