Hi
GrazielleSincerely apologize for any inconvenience caused. Please check if you could still transfer data to PC via USB cable and try to back up data.
Please try following steps to access recovery mode.
1. Keep pressing "volume down key"
2. Press "power key" and stop press " power key" once you feel the vibration
3. Still keep pressing "volume down key" and stop press "volume down key" once you enter [Android Recovery] Screen
4. Choose "Wipe data/factory reset"
#Hardware Reset Guide
https://www.asus.com/support/FAQ/1006346/If the situation remain the same, please contact ASUS repair center in the country of your residence:
https://www.asus.com/support/Service-Center-All-Countries/If it is impossible to access the service center during Covid-19 period, please try Call us:
https://www.asus.com/support/CallUsBy calling, they may ask you some basic information, kindly check your model name and Serial Number before calling.
#How to find product Serial Number
https://www.asus.com/support/article/566