Though my (minor) problem couldn't be solved, I still appreciate your replies Tsac. I'll just live with this 'hidden' folder till I switch to a new phone.
PS. I wouldn't hide photos that could get me in trouble on my phone (high chance of getting stolen/lost) and I would suggest to anyone else who reads this to do the same. Just wanted to install it in case I have to carry confidential work images when I don't have a flashdrive on hand