Let us start adding your cloud accounts starting with Google drive.
Tap on accounts to access and start adding the accounts.
Tap on the + symbol at the top right of the Accounts screen.
This would give a drop down menu of the available cloud services to select from.
Select Drive to add.
Once selected, this would give a list of IDs that are configured on the device and also an option to add new IDs.
Sign in with an existing account and sync the services.
Click on accept to fetch the data.
Once the sync process is complete, Google Drive is ready for access.