The WD 4TB USB hard drive keeps showing some hardware errors but I also doubt that's the main problem here. Still, to find the cause of the freezes we should start removing things from the equation. Please try each of these separately:
* Leaving the WD 4TB USB hard drive unplugged
* Selecting 'Ubuntu on Wayland' on the login screen
* Selecting a different Nvidia driver version in the 'Additional Drivers' app.
Indeed those logs still don't explain any freeze.
The WD 4TB USB hard drive keeps showing some hardware errors but I also doubt that's the main problem here. Still, to find the cause of the freezes we should start removing things from the equation. Please try each of these separately:
* Leaving the WD 4TB USB hard drive unplugged
* Selecting 'Ubuntu on Wayland' on the login screen
* Selecting a different Nvidia driver version in the 'Additional Drivers' app.