uhhhh…

to get 10G speeds on your network!

Yes, it could!

Go ahead and replace it!

Even if you only have 100 Mbps internet, you still want to make sure your router and switches are 1 Gbps…

it will give you enough overhead in the connections, especially if you still want to transfer data from one device to another on your network.

It depends on the router and what that USB port can be used for…

on some, it may be just for printers.

If you need a NAS, you are best served with going to something from Synology, etc.

Does your modem have 2.5 out or higher? If not, it won’t matter what your router has!

If so, you could do something like this:

https://www.amazon.com/ASUS-Rapture-Gaming-Router-GT-AX6000/dp/B09L8PCTPT?th=1

I use Ubiquiti at home!

You can do it, but it is not recommended! I would do it shortly, just to test speeds or something like that, but wouldn’t keep it permanently like that!

The router “protects” you from the outside world, as you are not exposed from a security standpoint

Will this be used for home or at work?

You might look in to the Ubiquiti line, such as the UDM Pro or UDM Pro SE:

https://store.ui.com/us/en/products/udm-pro

Cisco is usually used in corporations, so there may be licensing to pay to get some features.

Better to stay with prosumer if your needs aren’t on a corporate level!

Sounds like you have a bad cable somewhere!