What type of file is likely to be affected by FTK's compound file processing?

FTK's compound file processing primarily affects email files because these often utilize compound file formats, such as Microsoft Outlook's .PST (Personal Storage Table) or .OST (Offline Storage Table) files. These formats combine multiple data elements—such as messages, attachments, and metadata—into a single file structure. FTK is designed to extract, process, and analyze these complex file types, enabling forensic examiners to retrieve and investigate the contents within.

In contrast, text files, graphics files, and database files typically do not employ the same compound structure and are often handled using simpler extraction techniques. Email files represent a more intricate data organization, which is why they specifically benefit from FTK's advanced processing capabilities. Thus, when dealing with the analysis of email communications and their contents, FTK's compound file processing plays a crucial role in accessing and evaluating relevant evidence stored in these formats.