Hello and thank you for your usefull project !

I installed a first time my USB key on default fs, but Ubuntu complete iso is 5Go… So fat32 is not sufficient.

I installed the tool with ext4 and… the partition is now read-only, I can only write it with sudo rights.

Do you have any idea why ?

Command used to install the tool
sudo ./multios-usb.sh -f ext4 /dev/sdb 20G

Thanks !