per project p\ckages replication

why unity for per new project copy megabaits of packages

and notreusing them
space problems, I am only lerning and I have to economy space

 

You must not have checked the packages folder from an external file browser. Unity only keeps one copy of every package you're working with. The packages folder has a single file that is a few kilobytes in size that lists every package in use and the version of the package.

You can test this by trying to modify one of the packages inside of Unity. It will generate an error saying it's read-only.

That said the real problem you're going to have is the Library folder. Unity's Library folder is a cache that stores a copy of the files in your project in a format that is optimized for quick use. There is no way to disable it and it will grow as your project grows. If you don't have much in the way of storage you will want to look into buying more.