Remove the 4 hex screws(9mm) using a #2 Allen head bit, under the motor on each arm of the drone, then the 2 hex screws (6mm) next to those previous 4.

Remove the final hex screw(9mm) using #2 located next to the landing gear legs, then use a screwdriver to remove the 1 Philips head screw(9mm) on each arm using a 00 Philips Bit head.

The total number of screws should be 28