nRF52 and RP2040 devices use the [Drag & Drop](/docs/getting-started/flashing-firmware/nrf52/drag-n-drop) installation method to install firmware releases.
You may wish to perform a [Factory Erase](/docs/getting-started/flashing-firmware/nrf52/nrf52-erase) prior to installing firmware to clear data that may change format and location between releases.
If your device did not come with the Arduino bootloader you will need to [perform the conversion](/docs/getting-started/flashing-firmware/nrf52/convert-rak4631r).