They might be zip or 7zip files. Create a separate folder for them and unzip in the separate folders. Then go into the newly unzipped folder and select the setup file. Follow the screen instructions like when installing most anything. I have never backed up anything to update the drivers although I do keep a backup of my data that I do not want to lose. If the update does not update right, no worries. Just do it again. Check in "device manger" afterwards to see if there is a yellow marker on the device or devices that you have updated. If there is just run the update again. bad driver updates are rare.
Once I downloaded and installed the drivers of one of my comps and tried to install them on the wrong comp. I couldn't figure out why the updates were not taking. Then it hit me, the drivers were for the other comp.
Do not let windows install MB drivers. I have been bitten a few times like that. Windows will sometimes try to install old or just outright the wrong drivers sometimes. Lost my audio once like that, lost my internet connection with bogus lan drivers from windows and outdated video drivers from windows too. When windows suggests a driver update I hide that update and then go and check to see if there really is an update and then I update it my self. Sometimes there is no new update but windows wants to install something. Don't do it.