As a downside of this particular pack, we can point out the user license.

The pack is a collection of textures from Twinmotion and are available at the Epic Games Marketplace, which is great for artists trying to create real-time architectural visualization with the Unreal Engine. It is a huge download with about 8GB of files. You will find materials using resolutions starting with 512 pixels and going up to 4K (4096). The pack has a total of 497 unique PBR textures with multiple maps and resolutions. Today we have one of the largest packs of PBR materials available for download that we ever shared here in Blender 3D Architect. Would you like to download more than 400+ free PBR materials?

If you are still at the early stages of building your asset library, you can jumpstart with a significant amount of them. A good collection of PBR materials is a critical resource for any artist working with architecture, regardless of the tool and renderer used. After a couple of months and years working with architectural visualization and following some of the tips of often post here about free resources, like PBR materials, you will probably have a few dozen of them in your asset library.

Free materials for blender