Now always new update come from Lenovo but if you Root your Lenovo Mobile than rooting lonovo can be done only after changing the Lenovo recovery mod with custom recovery mod.
If you change you Lenovo recovery mod with custom recovery mod and you get android version update , that update required your lenovo recovery mod because that recovery mod only can install the Android update
It is bit difficult to extract file if you insert memory card and pendrive in your computer.
Many time your driver get install in computer and option of DATA of Pendrive and Memory Card show in computer. But if you will see the DATA and click on it you will see blank (means no DATA on it ) or it will ask you to format the Pendrive and Memory Card DATA. So it is very hard for you in both the stage but this is not so big problem if you will see video in my this Post.