Often, names like "bdh002" are the result of automated systems or high-volume archiving. They act as a "serial number" rather than a title. You’ll frequently find these in:
A "lost" fan-made expansion for an early 2000s PC game. The Lesson of the Archive
A collection of driver manifests from a defunct logistics company in 2004.
The Digital Time Capsule: The Mystery of the Unlabeled Archive
To the casual observer, it’s just a string of alphanumeric characters. To a digital explorer, it’s a locked room in a sprawling Victorian mansion. Why Are Files Named This Way?
Old corporate servers where files were indexed by database ID rather than human-readable names. The "RAR" Mystique