Full Install on USB?

Briefly describe your issue below:

I want to fully install Parrot OS on a usb. I set up a small partition on it, burned the .iso, and i want to install parrot os on the second partition. What do I do? I selected manual install, and I am at the part where its asking how I want to use the second partition of the usb.

What version of Parrot are you running? (include version (e.g. 4.6), edition(e.g. Home//KDE/OVA, etc.), and architecture (currently we only support amd64)
I forgot lol im still installing, but I’ll chech after
What method did you use to install Parrot? (Debian Standard / Debian GTK / parrot-experimental)
Still installing
Configured to multiboot with other systems? (yes / no)
Not yet
If there are any similar issues or solutions, link to them below:
I checked, but they dont answer what I want
If there are any error messages or relevant logs, post them below:
-3-