https://devzone.nordicsemi.com/f/nordic-q-a/59346/nrf52840-dk-drive-disappears-after-nrfjprog--I got the dev board all set up and working - managed to program a few examples flashing LEDs etc…. So then I wanted to do a BLE peripheral beacon example and it told me to program the soft device - I eventually managed to set up and run the nrfjprog toolen-USTelligent Community 13Wed, 25 Mar 2020 10:43:46 GMThttps://devzone.nordicsemi.com/thread/241563?ContentTypeID=1Wed, 25 Mar 2020 10:43:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4d229f9d-d843-4907-acb4-9b44110e69b2Joakim Jakobsen<p>So you flashed the nRF52840-DK with a file that caused it to stop appearing as a flash drive?</p> <p>Could I ask you what file you downloaded to the board? <br />Have you tried to recover the device? i.e nrfjprog --recover (ref: <a title="nRF Tools" href="https://infocenter.nordicsemi.com/topic/ug_nrf5x_cltools/UG/cltools/nrf5x_nrfjprogexe_reference.html?resultof=%22%72%65%63%6f%76%65%72%22%20%22%72%65%63%6f%76%22%20%22%6e%72%66%6a%70%72%6f%67%22%20">nrfjprog commands</a>).</p> <p>Best regards, <br />Joakim</p><div style="clear:both;"></div>