You might be thinking: How can a spreadsheet be on Google if it isn't public?

The answer is misconfiguration. There are three primary ways these files end up exposed:

Once the file is in a public directory without a robots.txt disallow, Google will find it.

| Risk | Explanation | |------|-------------| | Malicious files | .xls can contain macros or malware. Open only in a sandbox or use a text viewer first. | | Outdated data | Many exposed files are years old; emails may be invalid or repurposed. | | Legal liability | Accessing a file that was clearly intended to be private (even if misconfigured) may be illegal. | | False positives | Some results may be honeypots or decoy files. |

Configure your DLP software to block the upload of files named *email*.xls to public cloud storage or external drives.