Establish a quarantine bucket for uploads. Upon file upload, trigger a Cloud Function to invoke a custom-built machine learning model designed to detect PII. If PII is identified, transfer the file to the 'Classified Data' bucket.

Set up a quarantine bucket for uploads. Utilize Cloud Scheduler to execute an hourly job that calls a custom-built machine learning model trained to detect PII. If PII is found, move the file to the 'Classified Data' bucket.

Implement a quarantine bucket for uploads. Use Cloud Scheduler to run an hourly job that invokes the DLP API to apply infotypes for PII detection. If PII is detected, move the file to the 'Classified Data' bucket.