How to make convert recovery ISO to USB

[Willy_5]

Hi, I created my own recovery dvd in ISO format long time ago from my MSI laptop and now I tried to convert them into bootable USB.
it has 6 iso's in total. but i can get all 6 iso's into one bootable USB. I have tried powerISO and UltraISO, they will just take 1 iso to convert and the rest seem to have to be converted seperately.
Any solution so i can put all my recovery ISO's into 1 USB and restore my laptop from USB? i need help, please... thank you so much

 

[ArtPog]

My comment/suggestion does not directly address your specific query but I would like you to consider another option which I believe is a more practical one to achieve your objective of comprehensively backing up your entire system and "recovering" that system in the event the system becomes dysfunctional for any reason.

(I'm assuming that at the moment you're presently working with a viable system and there's no need for any "recovery" process of your MSI laptop at this time.)

Using a USB external enclosure and a HDD (or SSD) sufficient in disk-space capacity to contain the complete contents of your laptop's system together with a disk-cloning program, from time-to-time (as you desire) clone the entire contents of the laptop's system to the USB external drive. It's simple - it's reasonably quick, and most of all it's effective as a comprehensive backup & recovery tool.