There are two ways to revoke digi.me’s access to your Google Drive account:
To revoke access but keep your existing digi.me libraries:
Navigate to your Google Account Settings, select Security, followed by 'Manage third-party access' under the section ‘Third-party apps with account access’. You can then select digi.me, and click ‘Remove Access’.
To revoke access to digi.me and delete your libraries:
Open your Google Drive, select the settings cog and click on Settings. Press ‘Manage Apps’, then locate digi.me. You can then expand the options menu next to digi.me, and press ‘Disconnect from Drive’.