https://devzone.nordicsemi.com/f/nordic-q-a/5705/i-try-to-transfer-file-data-over-ble(mp3 or wav file) --&gt; sd_card --&gt; nrf51822 --&gt; smart phone Read the data from the SD_CARD transfers to smartphone. void BLE_SEND_VOICE(void) { f_mount(0,&amp;fs); f_open(&amp;fsrc, &quot;0:/voice.mp3&quot;, FA_OPEN_EXISTING | FA_READ ); while(1) { en-USTelligent Community 13Wed, 15 Apr 2015 16:28:47 GMThttps://devzone.nordicsemi.com/thread/19974?ContentTypeID=1Wed, 15 Apr 2015 16:28:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5dafe9b6-f213-4f24-b435-ccb2ccd5bba8hassan789<p>this is a great. thanks for sharing :D</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19975?ContentTypeID=1Wed, 15 Apr 2015 04:45:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:68484fe6-4977-476f-910c-cc9a92500bb1GunMin<p>hassan789, sorry I saw your post too late. Corrected some of my posts.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19972?ContentTypeID=1Wed, 08 Apr 2015 06:27:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37edd3e2-594b-4ab5-a59b-176a8b1e0a48GunMin<p>File Source is well done.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19973?ContentTypeID=1Mon, 06 Apr 2015 23:44:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e01fcc7f-ea11-4131-a85c-7d40b4a2496chassan789<p>were you able to get FatFS to work?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/19971?ContentTypeID=1Tue, 24 Feb 2015 13:01:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e8b38cca-098e-4894-bf75-2ebf668c4051Stian R&#248;ed Hafskjold<p>Sorry, I don&#39;t understand what your question is. Is the data you receive not as expected? Are you expecting to hear the sound clip?</p><div style="clear:both;"></div>