So i quicky found out that open a project that i saved in a usb will be so long. If i save unity project to my pc
it will only take a 20 second to open it but when i try open a project i saved in my usb it take so long 5 min to open it
Because USB is slow. You shouldn’t store Unity Projects on removeable drives (it is highly discouraged by Unity). When you make a backup of your project, do not copy your library folder content. But generally, you shouldn’t do that either, use version control to move projects and changes between computers if you want anything good for yourself.