I would like to enable the guest network on my VR400 modem router. I would wish this to be available for a restricted timetable to control access to the internet. Is this possible and, if so, how can

I have an Archer AV400 modem/router and have a USB drive plugged in to it. I would like to use this for storage and file transfer. I can access the drive via wifi using various devices (phones, tablet