PDFs are stored on the PC disk where HCM is installed. Controller PDFs are in the following directories: CPDFA, CPDFB, CPDFC. String PDFs are in the following directories: SPDFA, SPDFB, SPDFC. The prefix 'C' or 'S' designates controller or string. The final 'A', 'B', or 'C' determines the precedence given to PDFs during an IODF load or resync (for more details, see How PDFs are assigned to objects). HCM loads all PDFs from these directories when a new configuration is created or an existing one is opened.