Metadata is information about the data. The standard metadata of a file system are, for example, creator of the file, file size, date of creation and last access, etc. GRAU DATA, as a manufacturer of HSM and archiving solutions, has been dealing with this standard metadata for more than 20 years. In addition to this standard metadata, there is also extended metadata that represents a larger scope and usually contains a large amount of detailed technical information. A simple JPEG image e.g. contains 120 additional metadata (exposure level, GPS data, etc.).