How do I install UE4 on a external or slave drive?

I’ve tried to install the Unreal Engine but SSD doesn’t have enough room. Is it possible to install it on one of my external drives or a slave drive? If so, how?

Install the launcher itself on the different drive, it will install the engine to the location of the launcher.
If you want to be really tricky and advanced, you could use this tool to create hard links -
However, if you don’t understand what it does, you should not use it.

Thank you, that worked perfect.