Windows 10 update files

[dradu20]

Hello!I have windows 7 and right now I'm trying to install windows 10.I want to delete everything but I want to keep some files I choose.What should I choose between these options so I can select afterwards what to keep?
https://imgur.com/YHcA3Ku

 

[rgd1101]

backup the file to another drive

 

[Mark RM]

Backup the things you want to keep and do an entirely fresh install. Windows install can't do this in as a granular a fashion as you seem to desire.