There are two ways to access your Google Drive from your email. The first way is to log in to your Gmail account and click on the "Google Drive" icon in the top right-hand corner. This will take you to your Google Drive account where you can access your files.
The second way to access your Google Drive from your email is to click on the "Files" tab in Gmail. This will bring up a list of all of the files that are attached to your email account. To access your Google Drive files, click on the "Google Drive" option in the left-hand sidebar.