If you have two or more Google accounts, you can keep all of your data synced and backed up in one place by making use of the “Share” feature.
Sign in to your primary Google account.
Go to drive.google.com.
Create a folder you want to back up your data into.
Add your files.
Right-click on the folder and click “Share.”
Add the email address of your other Google accounts.
Now your data will be synced and collectively shared among your other Google accounts.