https://devzone.nordicsemi.com/f/nordic-q-a/42302/sdk-block-devicesI am looking into interfacing a SD card to the nRF52840. I have used the FatFS example and that is working ok with SPI. Then I have looked at the QSPI example and that also works, but it doesn&#39;t use FatFS. I then see that FatFS uses a &#39;Block Deviceen-USTelligent Community 13Tue, 15 Jan 2019 09:24:04 GMThttps://devzone.nordicsemi.com/thread/165674?ContentTypeID=1Tue, 15 Jan 2019 09:24:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6f904462-2c1d-4ed7-9eb7-b6348beaaf58Pawel Zadrozniak<p>Block device is a universal abstraction for storage devices operating on data blocks.<br />If FATFS port uses block device API then you can instantiate nrf_block_dev_qspi instead of nrf_block_dev_sdc and use the filesystem on QSPI flash.</p> <p>Take a look at usbd_msc example. QSPI block device is used there, as fas as I recall.</p> <p><a href="https://www.nordicsemi.com/DocLib/Content/SDK_Doc/nRF5_SDK/v15-2-0/group__nrf__block__dev">www.nordicsemi.com/.../group__nrf__block__dev</a></p><div style="clear:both;"></div>