Should i take backup of all my stuffs before upgrading to win 10 ? Or it will just replace my OS ?

[WPCentral Question]

Should i take backup of all my stuffs before upgrading to win 10 ? Or it will just replace my OS ?

 

[Rising Mos]

You can have it replace your OS without deleting application and data or with deleting. it is your choice.

Having said that, it is always good to backup