Issue Summary: Pre-signed AWS S3 URL Downloads Successfully in Postman but Returns 403 Forbidden on nRF5340 Devicehttps://devzone.nordicsemi.com/f/nordic-q-a/127409/issue-summary-pre-signed-aws-s3-url-downloads-successfully-in-postman-but-returns-403-forbidden-on-nrf5340-deviceHere is a focused support ticket description for your actual issue: Device: nRF5340 DK ( nrf5340dk_nrf5340_cpuapp ) SDK Version: nRF Connect SDK v2.5.1 Modem: Quectel EC200U over PPP ( uart@9000 ) Description The device successfully receivesen-USTelligent Community 13Mon, 16 Mar 2026 08:52:56 GMTRE: Issue Summary: Pre-signed AWS S3 URL Downloads Successfully in Postman but Returns 403 Forbidden on nRF5340 Devicehttps://devzone.nordicsemi.com/thread/563291?ContentTypeID=1Mon, 16 Mar 2026 08:52:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c4357be9-4ab3-4ce3-aca2-6233d44921ecSyed Maysum Abbas Zaidi<p>Hi,</p> <p>Thanks for your detailed explanation. It looks you might need to&nbsp;increase&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-2.5.1/page/kconfig/index.html#!%5ECONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE$">CONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE</a>&nbsp;to accommodate the long file name as mentioned&nbsp;<a href="https://docs.nordicsemi.com/bundle/ncs-2.5.1/page/nrf/libraries/networking/azure_fota.html">here</a>. You may try setting this as:</p> <p><pre class="ui-code" data-mode="text">CONFIG_DOWNLOAD_CLIENT_MAX_FILENAME_SIZE=2048 # or larger than 1852</pre></p> <p>Best Regards,<br />Syed Maysum</p><div style="clear:both;"></div>