The system's System SD card is used to store the files. This is a mandatory card that is present in all IP500 V2 systems. The firmware files are loaded onto the card in a number of ways:
If the system was upgraded using the Recreate SD Card option in IP Office Manager, the firmware is automatically copied onto the card as part of that process.
If the system was upgraded using IP Office Manager's Upgrade Wizard, if the Upload System Files option was selected, the firmware is copied onto the card as part of that process. The Upload System Files option is enabled by default.
If you think the correct files are not present, you can use the embedded file manager part of IP Office Manager to check the files on the card and to copy the files onto the card if necessary.