How to install Ubuntu on External HDD

Question

I tried to install Ubuntu gnome on new External HDD but I always get two error's

1. There is to many primary partitions

2. There is no root file system defined please correct partitioning menu

How can I fix this?

Answer 1

There is to many primary partitions

Your are limited to 1 primary partition. If needed create logical partitions inside the primairy partition and you are able to install in it.

There is no root file system defined please correct partitioning menu

Linux must have at least 1 partition named "/". If you do not create that the installer will stop until you have created it.