COWON D3 Pro Firmware V6.05
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/title_point.gif)
Information
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
COWON D3 Pro firmware version 6.05 is for upgrading version of x.53/x.54/x.55.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
If the version of the firmware installed on your device is lower than x.53 version,
please install the x.53 version first before upgrading to version 6.05.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
Firmware version of your device can be checked at Settings > About D3 > Firmware version.
Warning/Caution
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
Back up any important data before firmware upgrade.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
If the file system is NTFS, please back up every kind of data.
After firmware upgrade go to Settings > Storage > Format internal memory > FAT32 > Delete all.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
Please pull out the MicroSD card that was inserted in D3 before firmware upgrade.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
Please make sure the AC adapter is connected during firmware upgrade.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_red.gif)
Do not turn off the device before firmware upgrade is completed.
Power shortage might cause damage on the device, and the damage will not be covered by warranty.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/title_edit.gif)
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/dot_green.gif)
System
Errors cleared : NTFS File System mount issue
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/title_upgrade.gif)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_01.gif)
Use the USB cable to connect COWON D3 to the PC.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/d3_connect.gif)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_02.gif)
Select Turn on USB storage to copy files between PC and D3.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/a12.jpg)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_03.gif)
Copy and paste the firmware file to the root folder of the device.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/d3_paste.gif)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_04.gif)
Click "Safely Remove Hardware" icon in the tray at the lower right corner of your computer screen to
disconnect the device from the PC.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/d3_disconnect.gif)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_05.gif)
Select Turn off USB storage and disconnect D3 from PC.
![](http://support2.cowon.com/contents/dn2/data/C08/D3/images/a11.jpg)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_06.gif)
Connect AC adaptor with your device.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_07.gif)
Settings > About D3 > System updates, select the storage where the file is saved to start
firmware upgrade.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/d3_update.gif)
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/title_08.gif)
Upon finishing firmware upgrade, verify the installed firmware version from Settings > About D3
> Firmware version.
![](http://support2.cowon.com/contents/dn2/data/C08_old/COWOND3/images/d3_firm.gif)
Firmware upgrade can also be conducted through MicroSD cards by copying firmware files to the root
folder of MicroSD and inserting the MicroSD card into COWON D3.