https://devzone.nordicsemi.com/f/nordic-q-a/56069/starting-and-ending-address-of-user-flash-in-fds-and-fstorageHi, I am not getting the exact starting and ending address of user flash storage like other controllers, How we can find that while using FDS and Fstorage and also i want to know more about the difference between Fstorage and FDS. Thanks!en-USTelligent Community 13Thu, 02 Jan 2020 16:09:18 GMThttps://devzone.nordicsemi.com/thread/227293?ContentTypeID=1Thu, 02 Jan 2020 16:09:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fd80fac6-286e-4c93-b9ce-957e8b9249d4Hung Bui<p>Hey,&nbsp;</p> <p>The location of flash used for fstorage&nbsp;instance is defined in&nbsp;NRF_FSTORAGE_DEF() call (start_addr and end_addr). It described <a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_fstorage.html?cp=7_1_3_57">here</a>.</p> <p>The fds module&nbsp;use the fstorage module as the backend to interface with the flash. fds module choose the location of fstorage in&nbsp;flash_bounds_set() function. It&#39;s located at the bottom of the flash (right under the bootloader).</p> <p>The main difference between fds and fstorage is that fds is a file system where the record, file is defined. Where the fstorage managing the flash, writing, reading directly to flash. The fds uses the fstorage to read/write/erase into flash. Have a look at the documentation:&nbsp;<a href="https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/lib_fds.html?cp=7_1_3_56">infocenter.nordicsemi.com/.../lib_fds.html</a></p><div style="clear:both;"></div>