Update device-update-configuration-file.md

Author: eshashah-msft

articles/iot-hub-device-update/device-update-configuration-file.md

@@ -40,12 +40,13 @@ When installing Debian agent on an IoT Device with a Linux OS, modify the `/etc/
 | connectionData  |If connectionType = "string", add your IoT device's device or module connection string here. If connectionType = "AIS", set the connectionData to empty string (`"connectionData": ""`). |
 | manufacturer | Reported by the Device Update agent as part of the **DeviceInformation** interface. |
 | model | Reported by the Device Update agent as part of the **DeviceInformation** interface. |
-|dataFolder| Optional field. This sets path for the ADU Data folder. Value is set. Default path is '/var/lib/adu'| 
 |extensionsFolder| Optional field. This sets path for the ADU Extensions folder. Default path is '/var/lib/adu/extensions'|
 |downloadsFolder| Optional field. This sets path for the ADU Downloads folder. Default path is '/var/lib/adu/downloads'|
 |aduShellFilePath| Optional field. This sets path for the ADU shell. Default path is '/usr/lib/adu'|
 |downloadTimeoutInMinutes| Optional field. This sets download timeout in minutes for update payload. A value of zero means to use the default which is 8 hours.|
 
+'Datafolder' field can be used to set path for the ADU Data folder.CheckDataDir() in the [health management check](https://github.com/Azure/iot-hub-device-update/blob/develop/src/agent/src/health_management.c) needs to be be updated to point to the value in the config file. The default path is '/var/lib/adu' is used otherwise. 
+
 ## Example "du-config.json" file contents
 
 ```json