Yes, you can easily connect the external hard drive to your PC. It is connected via USB 2.0 or USB 3.0 and the necessary drivers are installed automatically so that the hard drive is immediately ready for use as external data storage.
Unfortunately, we do not have our own experience with this specific product combination. Therefore, the question has been forwarded to our community so that someone more familiar with it can answer it.
As far as I know, this is a normal external hard drive that is "optimised for the recording function of TVs". Whatever that means exactly (quiet, suitable for 24/7 operation, ...).
So you can use the hard drive for the recording function of the TV, if it supports that. If your TV can record Netflix, it will also work with it.