I also buy hardware with the future in mind so I do not have to keep replacing it over time and it is a better value IMHO. Any of those would work, but if it were me, I would lean toward the fastest...

Instead of using Parental controls, consider using one of the guest network SSIDs as it should have schedule controls like my C8.

The power demands of the drive may be a bit much for the router. Does the lacie drive have a separate power source? If so that may not be the issue then. My C8 has a WD drive on the 2.0 USB port and...

Be sure it reset. Press and hold the WPS/reset button for at least 7-10 seconds (longer is better). The the router should reboot and when you get the sign on page, enter admin as the userid and admin...

The solution to a locked out router is to reset it to factory specs and re-entering the setup info which will include the log-in info. See your manual or online for instructions to reset the router.

I have an Archer C8 for over three years and it is still working fine.