Click the settings icon, then click Download Backup and Sync for Windows.

Click Download.
 

Click Agree and download.
 

Click to open the download.

Click Run.

Click Get Started on the Google Drive window.

Enter your Google account email and click Next.

Enter your password and click Sign in.

Click Got It.

Choose if you want to back up any folders to Google drive, the quality of uploads, and whether to upload photos. Click Next when you are done.

Click Got It.

Click Start.

You can now access your Google Drive through the folder on your computer.

Mac Instructions

Step 1:Log in to your Google account and navigate to your Google Drive.

Step 2:Click the settings icon, then click Download Backup and Sync for Mac.

Step 3:Click Download.

Step 4:Click Agree and download.

Step 5:After the app has downloaded, double click on it to install.

Step 6:Drag the Backup and Sync icon to your Applications folder.

Step 7:In Finder, click Applications and double click on the Backup and Sync for Google app. 

Step 8:Click Open.

Step 9:Click Get Started.

Step 10:Enter your email and click Next.

Step 11:Enter your password and click Sign in.

Step 12:Click Got It.

Step 13:Choose if you want to back up any folders to Google drive, the quality of uploads, and whether to upload photos. Click Next when you are done.

Step 14:Click Got It.

Step 15:Click Start.

Step 16:You can now access your Google Drive via the folder on your computer.