Boot from USB - Cisco ASA 5525x

[bradf1405]

Hello,

I have Cisco ASA 5525X - 8GB memory,  128GB SSH

1. I want to save the boot image to a  USB stick.   
   Could you provide CLI commands to save boot image to USB.
   Also provide me CLI commands to restore the boot image from USB back to DOM
     
2. Then I would to change the BOOT order so the device boots from the USB (first option), SSD (2nd option), DOM (last option)
   Also CLI commands to reset Boot order back to default

Any assistance would be greatly appreciated.

Brad Francis - QLD Outback Australia.

[marce1000]

 - FYI : https://community.cisco.com/t5/network-management/usb-that-works-with-asa-router-and-switch-for-cisco-equipment/m-p/4276139#M138183
            https://community.cisco.com/t5/network-security/bootvar-and-boot-command/m-p/2542625#M234860

 M.