GIGA R1 FS Volume mount and unmount continuously

Official Hardware Mega GIGA R1 WiFi
1

I was just playing with main.py file and when the GIGA is connected to a Mac or PC the FS volume is continuously mounted and unmounted with a 2-3 second frequency.
I reset the board and reloaded the firmware with Micropython.app but problem still there.
What I noticed by recording the screen on W11 PC is that the files present on the board are not reset to the default ones after new firmware download.
How can I completely reset the GIGA files content to the default boot.py and main.py and get out of this never ending loop?
The current content on main.py is this, boot.py is not present:

# This is a sample Python script.
import pyb
import time

# Press ⌃R to execute it or replace it with your code.
# Press Double ⇧ to search everywhere for classes, files, tool windows, actions, and settings.

print("ciao")
led = pyb.LED(2)
led.off()
time.sleep(1)
led.toggle()
time.sleep(1)
led.toggle()
time.sleep(1)
led.toggle()
time.sleep(1)
led.toggle()