The last thing anybody wants is an 'oh-sh**' moment when they realized AFTER they pressed the 'OK' button that the files they wanted just went bye-bye.
A nandroid is simply a complete volume image of your phone at that point in time, so if you mess something up, you can restore the nandroid and your phone will be right back to where it was at the time of backup.ĭepending on the root method, you may end up resetting your phone, so make sure you understand exactly what's going to happen and backup all your important data. That's one of the reasons why most root methods include installing a custom recovery like CWM or TWRP that can make a nandroid backup. The more you mess with the system areas, the more chance there is to break something. Using root privileges can be benign or potentially damaging depending on what you are attempting to do.
If you never use it, there's no security risk.
Rooting only provides you the ability to elevate permission temporarily to administrative levels.
