11 Sept 2017 — So far I understand it like this: * Resources: A way of referencing assets by filename instead of GUID rerefences (the normal way) Unity Discussions Assets, Resources and AssetBundles - Unity Learn
Resources vs StreamingAssets for mobile. - Unity Discussions resources.assets
Unity must build the entire index of this file at startup. If you have thousands of assets, this can cause significant delays (several seconds on mobile) before the game even starts. 11 Sept 2017 — So far I understand