When we import textures we set an LOD Bias to keep them more performant.
This isn’t a big deal except that a lot of content out there has really really big textures as they weren’t meant for games really.
In any case, you can throw away the extra data on your textures that were not using if you don’t think you need it. You can always reimport from the source texture if you determine later you need more resolution for a particular texture.
Right click your textures in the content browser and in the you should see “Resize Texture Import Data”
