https://devzone.nordicsemi.com/f/nordic-q-a/5564/pstorage-sd_flash-ble_flash-nvmcHello, I want to use flash for logging sensor data and sending via BLE. I found several APIs for store data to flash. pstorage (Persistent Storage Access Routines) sd_flash_... ble_flash_... NRF_NVMC_... However, I cannot understanden-USTelligent Community 13Fri, 13 Feb 2015 12:32:30 GMThttps://devzone.nordicsemi.com/thread/19501?ContentTypeID=1Fri, 13 Feb 2015 12:32:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:adc721cd-b152-490b-a06a-d427b274dda8Bill Siever<p>pstorage is a higher-level library for managing flash. The sd_flash_ routines are lower-level operations that interact with the NRF_NVMC module&#39;s registers (which user code can&#39;t interact with directly when using the soft device). The ble_flash_ routines are older than the pstorage library and maybe even a little out of date.</p> <p>pstorage has some overhead (callbacks / asynchronous operations), but if you need to update flash while &quot;on-air&quot;, it&#39;s probably the best choice for a few reasons:</p> <ol> <li>It avoids conflicts with flash writes and radio on-time</li> <li>It can be used across modules, including when a device needs to &quot;bond&quot; (more secure connections and some persistent configuration settings)</li> </ol><div style="clear:both;"></div>