Google Drive Access Review

What Google Drive Access Review Means in Practice

A Google Drive access review is not just an administrative check box. It is a governance control that tests whether file, folder and shared-document access still matches business need, especially where sharing has accumulated over time through collaboration, external sharing or role changes.

Because Drive permissions can spread quickly across individual files, folders and shared drives, the review has to look at effective access, not only nominal ownership. That means identifying who can open, edit, comment or resharing content, then deciding whether each permission still has a current justification.

Why Access Reviews Matter for Google Drive

Drive often holds sensitive operational, customer or internal material, so overexposure becomes a data-security problem as much as an access problem. Stale access can persist after project changes, team moves or departures, and that creates a long tail of unnecessary visibility into documents that were never meant to stay broadly shared.

Reviews also matter because the sharing model in collaboration tools can blur accountability. A folder inheritance pattern, a direct share, or an external link can all produce access that looks acceptable at a glance but is broader than intended, which is why access review is used to re-establish ownership and responsibility.

For Google Workspace environments, this sits naturally alongside broader workspace hardening practices, including Drive sharing controls and auditability described in the Google Workspace Security Guide.

How Organisations Review Exposure and Prove Control

An effective review starts with inventory: which users, groups, shared drives and external collaborators can reach the content, and which files are most sensitive. The practical question is not only “who has access?” but also “who can reshare, delegate or expand that access?”

That process becomes much stronger when it is tied to identity governance rather than treated as an isolated spreadsheet exercise. A review campaign should be able to distinguish legitimate ownership from inherited access, temporary access from standing access, and business-approved sharing from convenience-based oversharing.

The IAM and IGA Basics guide explains the governance model behind certification, while the Access Reviews and Certification Guide focuses on reducing review volume and avoiding rubber-stamping.

Remediation, Evidence and Ongoing Hygiene

After the review, the value comes from removal and follow-through: revoke access that is no longer needed, correct group membership, reduce broad folder-level inheritance, and validate that external sharing is still justified. If a shared document has become a de facto repository for sensitive material, access trimming alone may not be enough without restructuring who owns it and how it is shared.

Review evidence should show who approved access, what was removed, and when the cleanup happened. That record matters for repeatability, auditability and demonstrating that the organisation can control access consistently over time rather than only after a problem appears.

Where access is tied to a person or contractor lifecycle, the cleanup should align with offboarding and expiry. The Contractor Identity Lifecycle Guide is useful when access review needs to account for non-employee access paths, and the NHI Lifecycle Management Guide is relevant when shared resources are exposed through service or automation accounts that also need periodic recertification.

For document sprawl and oversharing patterns, the Unstructured Data and File Share Security Guide provides a useful adjacent model for finding and cleaning up broad access to content repositories.

What Good Review Outcomes Look Like

A strong Google Drive access review does not aim to preserve every existing permission. It aims to make access explainable, current and minimal. The best outcome is a cleaner permission model in which sensitive files are reachable by the people who need them, external exposure is deliberate, and future review cycles are easier because the sharing structure is already simpler.

That is why access review should be treated as a recurring control, not a one-time remediation event. The best programmes use it to reduce permission drift, keep sharing decisions visible, and make it much harder for stale access to become normalised.

Related resources from NHI Mgmt Group

• What should IAM teams review when SAML attributes drive access control?
• How do security teams decide when to use DLP controls instead of manual review for Google Drive downloads?
• What breaks when organisations rely on manual review to find PCI data in Google Drive?
• What breaks when organisations rely on access controls alone to protect files in Google Drive and OneDrive?