When you boot from the ISO, there is often a boot menu entry for Boot from External Hard Disk
Did you try that?
Or just boot from a real system.
Or edit the TAILS boot menu (press TAB if MBR booting or 'e' if grub2 UEFI-booting) and remove the live-media=removable text.
Then boot by pressing ENTER (or F10 if grub2).
Did you try that?
Or just boot from a real system.
Or edit the TAILS boot menu (press TAB if MBR booting or 'e' if grub2 UEFI-booting) and remove the live-media=removable text.
Then boot by pressing ENTER (or F10 if grub2).