Installing Windows.

[cheddar-caveman]

2018 15" MBP.

Can I install and run Windows from an external hard drive? I am run-in gout of space on my MBP but have two 1Tb drives available.

Alternately can I change out the internal drives for a bigger one. The installed one is only 250Gb and a "Container Disc" is taking up 50Gb of this!

 

[boswald]

I think you can choose which disk you want to install to from the installer.

 

[Shirasaki]

To change internal storage you need to change the whole motherboard. Basically, buy a new Mac with higher internal storage.