http://docs.kali.org/installation/kali-linux-live-usb-install Adding Persistence to Your Kali Live USB Adding persistence (the ability to save files and changes across live boots) to your Kali Linux image can be very useful in certain situations. To make your Kal i Linux USB stick persistent, follow these steps as the root user. In this examp le, we assume our USB drive is /dev/sdb. If you want to add persistence, you ll ne ed a larger USB device than we listed in our prerequisites above. Image the Kali Linux ISO to your USB stick as explained above, using the Linux Me thod and dd. Create and format an additional partition on the USB stick. In our example, we u se gparted by invoking: gparted /dev/sdb Your current partitioning scheme should look similar to this: Proceed to format a new partition of your desired size to be used for persistenc e. In our example, we used all the remaining space available. Make sure the volu me label of the newly created partition is persistence, and format it using the ext4 filesystem. Once the process is complete, mount your persistence USB partition using the fol lowing commands (as the root user): mkdir /mnt/usb mount /dev/sdb2 /mnt/usb echo "/ union" >> /mnt/usb/persistence.conf umount /mnt/usb Plug the USB stick into the computer you want to boot up. Make sure your BIOS is set to boot from your USB device. When the Kali Linux boot screen is displayed, select Live boot from the menu (don t press enter), and press the tab button. This will allow you to edit the boot parameters. Add the word persistence to the end of the boot parameter line each time you want to mount your persistent storage.