Usually exactly 8MB or 16MB depending on the flash chip.
Power on the receiver while holding the on the front panel until "Update" appears on the screen. RS232 Loader Method:
: Only download dump files from reputable satellite forums (like Sat-Universe or Zinetsat ) or official Geant support sites. Files from unknown sources can permanently damage (brick) your device.
Unlike a standard firmware update, a "Dump" is a full copy of the SPI Flash memory. It is used when the receiver is completely unresponsive and cannot be updated via the normal USB menu. How to Use the Dump File
Place it in a folder named files on a FAT32 formatted USB drive. Plug the USB into the receiver.
Are you trying to fix a specific error code on your receiver, or
Fixing "Error 10", "Error 114", or the "Red Light" issue.