For the device you have, the encoding at quality resolution should take 3.5-7 GB for 30 minutes.
If you decide to capture the video raw (unencoded), then 30 minutes at 1080p, 60fps, 8bits color requires 625 GB of space. 782GB if you go for 10 bit.
Using a capture device that encodes the video always results in inferior video quality than capturing the video raw, and then encoding that video with a software based encoder. And if record using an encoder, and then re-encode again to have a lower size, the quality will suffer a lot.