What type of media can the Physical Disk Emulator (PDE) module not mount?

The Physical Disk Emulator (PDE) module is primarily designed to mount physical disk images, allowing forensic analysts to interact with the data contained on those disks as though they were working with a physical hard drive. With this functionality, the PDE is able to mount volumes, which are logical storage areas created on a physical disk. This means that volumes can be accessed and analyzed in a forensic context.

However, the PDE module does not support the mounting of folders or cases. Folders represent a hierarchical structure used for organizing files and documents, not a type of media compatible with the PDE. Similarly, cases are collections of evidence and data for the purposes of a forensic investigation, structured at a conceptual level rather than in a manner that can be directly interacted with as a mounted media type.

Therefore, the combination of folders and cases as listed indicates types of media that the PDE cannot mount, making it clear why this option is the correct choice. The focus of the PDE is strictly on physical and logical disks rather than the organizational structures that folders and cases represent.