It can be complicated to make a complete backup of your ROM but it is very essential for the people who are into rooting their devices and try tweaks on their phones, the very simple method to make a backup of your device requires the following
- A rooted device
- Full charged battery
- Custom Recovery installed
First you need a rooted device if your device is not rooted then try to root it , check the LIST for easy to use one click rooting soft wares which are easy to use, after rooting your phone you need to install custom recovery without which you cannot completely backup your phone, for that follow up these instructions to install Recovery , make sure you root your phone before installing recovery .
After you are done installing the recovery reboot your phone in recovery mode, power down your phone and then turn it on while holding the volume up and power button all together and when recovery is on nevigate it throgh volume buttons and click on “Backup and Restore” , this process will start the backup make sure you have enough storage in your SD card for the back up. It will backup everything on your device including the system files.