I have just purchased a CR10 V3 and it shows printer info as creality 3d 1.1.6.0, does this system have a bootloader as i have seen videos to update firmware by plugging from pc into sd card slot but i assume this is if a bootloader is present, thank you

Good evening, have upgraded my ender 3 pro to a skr mini e3 v2, is it normal for it to make a throbbing/humming noise occasionally and should my extruder occasionally make a clicking sound, thank you for your assistance