When I go to epic games and launch ue5, it says I don’t have it installed. But I have it on another hard drive, how do I do it?
you don’t “have too” use the Epic Games Launcher to open your projects, or to even create a project.
if you already have the engine/editor installed you can either:
launch the editor through for Windows the UnrealEditor.exe (my Engine is installed at D:\Unreal\ and the engine version is 5.1 so I would be at D:\Unreal\UE_5.1\Engine\Binaries\Win64\UnrealEditor.exe)
which should launch the Editor project select/creation window
if you have an existing project you should be able to just launch the .uproject which will use the OS location of the executable, if your OS doesn’t know where the Editor is installed it will prompt you to selected an appropriate program, which you would navigate to it similar to above, and select the Editor.
if you need to use the Epic Games Launcher (keep in mind for things like Admin or SuperUser authorizations you would “need” to give the Epic Games Launcher those authorizations as well)
you should be able to tell the Epic Games Launcher to install to the location that the files already exist, which should instead of downloading everything again check to see what already exists, and if everything is already there, just register its existence.
if there are files that are incomplete, damaged, missing it should re-download only those.