https://devzone.nordicsemi.com/f/nordic-q-a/126560/nrf54l15---speed-increment-of-lfs-mounted-on-external-flashHello, I am facing an issue of low speed of file read and write while using LFS on External Flash, Winbond (W25Q64JV) . This is the Configuration Im using in my DTS file, Can you please guide me how to increase the efficiency of the File system? en-USTelligent Community 13Mon, 19 Jan 2026 16:09:59 GMThttps://devzone.nordicsemi.com/thread/559074?ContentTypeID=1Mon, 19 Jan 2026 16:09:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:63a769f0-27c2-4172-9259-58819ebfbf23Menon<p>Hello,</p> <p>Based on the DTS you shared, the SPI bus is already configured to run at the maximum supported speed (32 MHz, <code>spi-max-frequency = &lt;32000000&gt;;</code>) for the nRF54L15. There is no higher reliable SPI interface speed available on the nRF54L15, <a href="https://docs-be.nordicsemi.com/bundle/ps_nrf54L15/page/pdf/nRF54L15_nRF54L10_nRF54L05_Datasheet_v1.0.pdf">see the product specification</a>.</p> <p>You may want to review your file system configuration to see whether any optimizations are possible.</p> <p>Kind Regards,</p> <p>Abhijith</p><div style="clear:both;"></div>