Q:

UNetBootin Unable to Detect Encrypted USB Drive?

I'm using UnetBootin to create startup disks, but it can't seem to detect my encrypted USB flash drive I creased using the Disks utility. The encrypted layer is unlocked, and the primary layer is mounted. Is there any way to resolve this?
EDIT 0:
Startup Disk Creator could see it just fine, seems to be a programming/configuration error.

A:

Unetbootin
Unetbootin wants a partition with the FAT32 file system on the target pendrive. I think it needs a plain file system without encryption, so you must prepare the pendrive (overwrite the current partition) before starting Unetbootin.
You can use for example Disks (gnome-disks) or gparted or mkusb to create a partition with the FAT32 file system.
Alternative
If you use a cloning tool, for example the new Ubuntu Startup Disk Creator (in Ubuntu 16.04 LTS and newer versions), Disks (gnome-disks) or mkusb, the cloning process will work directly. It will overwrite what was there before as long as the pendrive is healthy and can be written to.
Tools
gparted is available in the live sessions of Ubuntu and Ubuntu community flavours, but you must install it in installed systems,
sudo apt-get install gparted

mkusbis available via a Launchpad PPA according to the following link
help.ubuntu.com/community/mkusb

