The Package Manager can load a package from anywhere on your computer even if you saved it outside your Unity Project folder (for example, if you have a package called com.unity.my-local-package and you save it on the
Desktop but your Unity Project is under the
You can also use a folder inside your Project folder, provided that it is not one of the reserved Project sub-folders.
Click the plus (+) icon in the status bar.
The Add package from disk button appears.
Click the Add package from disk button to bring up a file browser.
文件浏览器将关闭，然后包现在显示在包列表中，并带有 local 标签。
You can place a local package anywhere inside your Project except under these folders:
||If you place a package inside this folder, the Asset Database imports any Assets under this folder twice: once as Assets and once as Package contents.|
||This folder is for settings Assets only.|
||If you place a package under this folder, the Package Manager automatically interprets it as an Embedded package, regardless of the reference in the Project manifest.|