https://devzone.nordicsemi.com/f/nordic-q-a/43501/transferring-a-file-pdf-jpg-png-etc-from-mobile-to-nrf52840I saw several threads that talked about this, but I could not decipher an exact answer, so apologies if this is a Re-Ask. I recently purchased a nRF52840 Dongle with the hopes of using it to test file transfers from a mobile application to the Dongleen-USTelligent Community 13Tue, 12 Feb 2019 09:00:39 GMThttps://devzone.nordicsemi.com/thread/170528?ContentTypeID=1Tue, 12 Feb 2019 09:00:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:59791ebe-589e-449d-8deb-9cb95f4bc505ovrebekk<p>Hi</p> <p>In general&nbsp;the dongle can do whatever the DK can do, but it is not designed for extended development.&nbsp;</p> <p>If you are planning to develop your own code it is recommended to do the core development on the DK, and then deploy it to the dongle once the code is functional.&nbsp;</p> <p>Alternatively you can populate the P1 header on the dongle and connect it to the DK, so that you can program and debug the dongle directly.&nbsp;</p> <p>The reason for this is that it gets tedious very quickly to have to run a full USB DFU procedure every time you have made some changes to the code, and not having any means of debugging the application running on the dongle.&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>