Use bootable usb drive for storage

Follow the steps to create usb drive which can hold installation live disk usb as well as use the same for storage also.

For this experiment i am using sandisk ultra 32 GB USB Drive

Partition your USB

Use KDE Partition Manger or Gparted to create two partition of your USB Drive

/dev/sdb1 ext4 (for holding your live usb)

/dev/sdb2 ext4 (for holding your storage files)

install, Unetbootin

sudo apt install unetbootin

mount your ext4 files system

Copy installation file to USB

Run unetbootin and select your partition /dev/sdb1 to restore the content of iso file containing the installation image. This will take few minutes.

Mark partition /dev/sdb1 as bootable

Use KDE Partition Manger or Gparted and right click on partition /dev/sdb1 and select properties.

check the boot option and apply the changes.

Now the USB Drive is ready for running the installation setup to install the os in /dev/sdb2 partition.