I had the same issue.
I am using Linux (Fedora) and I was formating the USB drive with the aplication "Disks" (default with this distro) and UNetBootin did not find the drive.
I fixed the issue by reformating the USB using GParted. Now it is visible on UNetBootin. I don't know why, maybe some partition flag?
Just mount your drive:
original answer from maxter (https://forums.linuxmint.com/viewtopic.php?t=165389)
This is what worked for me
sdb1
in Gparted.sudo mount /dev/sdb1 /mnt
.Try this (worked well in my case):
It is possible that the sequence you followed is as follows; your stick is formatted to contain a FAT32 file system.
You may have inserted the stick, selected your ISO, Unetbootin has detected your stick which reflects the screenshot of Unetbootin.
However, in the second step, you may have unmounted the stick manually or otherwise, but UNetbootim may not have refreshed
Now when you try to create the bootable USB, it cannot find where the stick is mounted because it has been unmounted.
Typically, I have noticed that the following steps work:
I had the same issue. I am using Linux (Fedora) and I was formating the USB drive with the aplication "Disks" (default with this distro) and UNetBootin did not find the drive. I fixed the issue by reformating the USB using GParted. Now it is visible on UNetBootin. I don't know why, maybe some partition flag?
Deleting all files from my USB (even hidden ones, found with
ctrl+h
) helped Unetbootin find it in my case, I didn't even have to reboot Unetbootin.