I attempted to update my iPad 3 (NOT jailbroken... yet) running iOS 7 to iOS 9 a few months ago, but ran into a major issue: whenever I tapped on "Continue" on the "Update Completed" screen, my iPad would simply restart itself and show the update screen, which often would be unresponsive to swiping. I know many others have had this issue when updating from iOS 7 to 9, and some found a fix, but before I'm prepared to wipe my iPad and depart with my data, I'd like to try to salvage as much of it as I can. Unfortunately, I was foolish and forgot to back up my iPad before I updated because I figured the update would go flawlessly, since it had been so smooth on my iPhone.
The challenge now is to try to gather as much data as I can before wiping. So far, I've been able to get my photos through the Photos application on my Mac running Yosemite, but I'd really like to get all of my data from the Notes app off of my iPad. In order to do so, I've used a few file managers, but can't find the directory anywhere, so it must be in root. Getting access to root would give me access to a lot of other data as well, so that would be ideal. But I know that root access is something you can only gain by jailbreaking, and I don't think my glitching iPad is even capable of being jailbroken at this point.
Given all of this, is it possible to get any other data off of my iPad before I wipe it? If so, how? Would jailbreaking help? And how would I jailbreak with my iPad in this state?