https://devzone.nordicsemi.com/f/nordic-q-a/122938/thingy-91x---using-the-external-flashAre there any specific points using the external flash of a Thingy:91X? I tried to adapt the &quot;nrf/samples/cellular/modem_trace_flash&quot; by adding an overlay copied and modified from the nrf9151dk_nrf9151_ns and also copied the conf from that board. en-USTelligent Community 13Mon, 14 Jul 2025 15:41:50 GMThttps://devzone.nordicsemi.com/thread/542410?ContentTypeID=1Mon, 14 Jul 2025 15:41:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:07b3b19e-c4b9-4db3-8e4b-15ead24bfd5cAchim Kraus<p>In the meantime I found, that &quot;thingy91x_nrf9151_ns_defconfig&quot; contains &quot;CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=4096&quot;. A 4MB flash will the be split in 64*16 sections, 16 time more than &quot;NRF_MODEM_LIB_TRACE_FLASH_SECTORS=64&quot;. Though I don&#39;t use the external flash for other functions for now, I decided to change to&nbsp;&quot;CONFIG_SPI_NOR_FLASH_LAYOUT_PAGE_SIZE=65536&quot;. With that it works.&nbsp;</p><div style="clear:both;"></div>