I unpack ubuntu 16.04 iso on my external HDD with GPT (made in Gparted - because of asus UEFI) - everything is fine, but I can't create working persistent storage... I've tried to create the second partition (at the same external HDD in addition to ubuntu partition) with Ext2 (labeled casper-rw) and type "persistent" after "quiet splash" in grub menu before booting, then tried to change grub by using
sudo gedit /etc/default/grub and
sudo update-grub with needed parameters, but nothing help
After restarting my data and options become default. What I do wrong?
I can't use any automatic programs, because they don't create live iso in GPT, any others partition tables are not working with my Asus UEFI (and I can't find "legacy bios" mode).
Can someone explain how to mount casper-rw or whatever I should do to solve my problem. I want to have live OS on my external HDD with persistent mode permanently and without typing every time "persistent" parameter while loading.
P.S. - Please, don't offer me install full Ubuntu version on my external HDD because after first replugging of this HDD it will never work again and moreover it will crash my Win 10 loader =(