My Google Account was hacked granting unauthorized access to YouTube and Google Drive. The third party immediately started posting inappropriate content on YT which prompted an email from Google after a couple of hours after which I changed my security settings and password. Aside from the password, my Google Account had been secured with phone authentication for unrecognized devices prior to the breach. My question is were they able to access my Google Drive? If yes, I have not seen any activity on the activity log for each folder (sharing, moving or something else) other than me. Does that suggest they have not taken over the files or what?