How to configure 360 for full system backup to external HDD?

How do I  configure 360 to backup my entire system ? 

 

I selected the C and D folders under My Computer and the backup ran, but it only took less than a minute and only seems to have stored 61MB of data on the external HDD.  My C drive has approx 10GB of data, programs and system files and the D Recovery Drive has approx 2GB of data.

 

Neither the help or support function within 360 seem to work.

 

Bill