https://devzone.nordicsemi.com/f/nordic-q-a/28204/trouble-reading-structure-from-fds_read-after-updateI had successfully write a structure data to fds. After which, I would like to update the same file and record key with new values of a structure. After updating, I will read one of the element from structure to ensure value is successfully updated. en-USTelligent Community 13Mon, 11 Dec 2017 14:22:07 GMThttps://devzone.nordicsemi.com/thread/111424?ContentTypeID=1Mon, 11 Dec 2017 14:22:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9e4ee0ff-c2c4-44e7-b589-034e7dada83bJ&#248;rgen Holmefjord<p>Which SDK version are you using? Note that <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/lib_fds.html?cp=4_0_0_3_50">FDS</a> operate asynchronously, meaning you will have to wait for the callback after a read before doing a read operation. Please check out the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.2.0/fds_example.html?cp=4_0_0_4_6_8">FDS example in SDK 14.2</a>.</p><div style="clear:both;"></div>