Just wondering if there is an option to flash the archim by sd card? Going to make some changes and looking for a more convenient way to flash rather than take the side panel off to hit the reset button.
No. This would require someone to develop a new bootloader for the board. This is non-trivial and would require modifications to the board.
Hitting the reset button is only necessary if the firmware on the printer has crashed. If it is running, the firmware flashing tool will be able to reset the printer into bootloader mode and flash the printer without you needing to take the case off.