gDRIVE accout association
I clicked on the gdrive from top right menu and it automatically asked me to connect to the last google account I logged in with the same browser
As soon as I realized this I stopped the process, then used the browser to log to the gmail accounted I wanted to associate, then reopend the my.avast.com page and relauched the google drive association procedure
So I was able to choose the account I wanted
besides this was the same google play account I used to pay for the premium license
So I don’t no if googledrive account MUST be same as google play account associated with premium license

regards