Data store or disabled?

Hello,

I’m building a server connect form now.

Like this link, I would like to use multi steps to fill in the big form. And same as this link instruction, I would like to put “back” button to go back to the previous page. But there are many inputs in the form, so “disabled input” doesn’t work for all inputs. In that case, should I use data store (like this) to go back and forward in the multiple steps’ form? or any other better way?

Thanks,