Originally Posted by radicalisto
Dirty flash your stock ROM - *appparently you can access KNOX even if your counter is 0x1 another user done so a month ago or so* - If that doesn't work. Then no-go, you'll have to forfeit your pics and learn a lesson in Note 3 issues. Don't root without knowing the consequences.
The whole idea of Knox is to keep your files safe. When the files could still be accessed after tampering with the phone, Knox would be useless. If Samsung could access the files, that would mean that there is still a backdoor in the system, which would be unsafe, which would also render Knox useless.
I take a lot of pics of my kids with my phone. I installed an app that syncs all my important folders to a PC when I plug in a charger at night, so my important stuff gets backed up automatically. You could use Titanium Media Sync (paid app) or Sweet Home (free) to automatically backup your photo's.