When Filerev scans your Google Drive account, it will retrieve a minimal amount of data about your files to accurately show what can be cleaned up in your Google Drive account. The Filerev app scans your account without downloading the content of every file but does store basic (meta) information about each file (file name, creation date, owner, etc). This approach allows Filerev to quickly scan many terabytes of data stored in Google Drive.
This data is not sold or used for anything except to help you organize your files in Google Drive.
Filerev will automatically remove this data after 30 days of inactivity in your account.