Meaning
Attributes of a digital file that exist outside the file content provide information about its origin and handling. While internal data shows what a document says, external metadata describes when it was moved, who had access to it and where it was stored on the server. These properties are managed by the operating system or the network file system rather than the application that created the file.
The tracking stops when a file is moved to a system that does not support the same metadata standards.
Contextual Layer
Information such as the file path and the system permissions assigned to a folder can reveal the sensitivity of the record. Analysts use external metadata to prove that a specific individual accessed a sensitive financial report at a time when they were not authorized to do so. This evidence is often more reliable than internal file properties which can be easily modified by a user.
Evidence Preservation
Transferring files between different operating systems or cloud providers can cause the loss of certain attributes. Losing these records during a migration means a company loses the ability to prove the original location and access history of its oldest files.
Format Constraint
Modern file systems store these attributes in hidden structures.
