He made it a bit of a pain to Download: not sure why. But if you can find your way to the download link in the description, get past the video you have to watch to get the secret code, you can get this great set! Nobiax, by the way, is that guy who makes increadible surface maps with texture, normal and displacement! Great stuff. This set includes those as well.
Reason for the external link could be the file size? Or just wanting some minor compensation (through the ad) for the work - like he actually says in the image?
Nothing too complex about the download: Click the link in the description, wait a few seconds to skip the ad, click the free download link at mediafire. You might have to pass a captcha verification (the “secret code”?) before getting the download link.