Cloud file sharing is now part of ordinary business work. A supplier may need a design file, a client may need a contract, or a staff member may need to work from home. The risk begins when access remains open after the work is finished or nobody knows who can see a folder.
Start with ownership
Every shared folder should have a business owner, a clear purpose and a defined group of people who need access. Avoid shared accounts where named users are available. Use a current staff and supplier list to check that permissions still match the work.
Use the smallest practical permission
Most guests do not need to edit, delete or reshare everything. Use view-only access where possible, separate working folders from archives, and keep finance, HR, legal, customer and operational records in clearly managed locations.
Make guest access temporary
Set expiry dates for contractors, projects and supplier reviews. If the platform supports approval workflows, alerts or link restrictions, enable them for sensitive folders. Do not treat a public link as a convenient substitute for a named person.
Review and respond
- Review external users and links on a regular schedule.
- Turn on audit logs and alerts for unusual sharing activity.
- Remove access when a project ends or a person leaves.
- Check whether cloud backups and recovery controls are available.
- Record what happened if a file was shared incorrectly.
Protect personal information
Before placing customer or employee information in a cloud service, understand what the provider stores, who can administer it and whether information may be accessed overseas. Keep sensitive data to the minimum required for the task and make sure your privacy and incident-response processes cover the service.
A practical review this week
Choose one high-value shared folder. List every external person, link and permission, remove anything no longer needed, set an expiry date for active guests and record the owner. Then repeat the same check for the next most sensitive folder. Small, regular reviews are easier to maintain than a once-a-year clean-up.
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