Tools for creating a macOS Mojave or macOS High Sierra Recovery HD Partition on any Volumes.
The USB key you choose will be formatted as a single partition, then you will have to select your Install macOS Mojave.app for the creation of the Recovery HD, when the package opens, you will have to choose the USB volume, as simple as that.
You will have to select your Install macOS Mojave.app for the creation of the Recovery HD, then when the package opens, you will have to choose the volume, as simple as that.