Can I add another sim card to my device with a domestic sim for large file uploads in certain areas as this would exceed my limit on particle
Generally no. The only device that it is even theoretically possible is the Boron BRN404X which has both a MFF2 SMD SIM and a 4FF SIM card slot. There is no built-in software for switching between them, however.
All other devices have a MFF2 SMD SIM and no SIM card slot and cannot be used with a 3rd-party SIM card.