Does Samsung KIES backup hidden photos in galery?

I made a hard reset on a friend's SAMSUNG I9082 GRAN DUOS and he forgot to tell me about his hidden items. On the KIES I selected all the possible options to keep, like a full backup (including configs, all pics and stuff). I wanna know if KIES keeps these hidden items on backup. Because right after I've had restored the backup there were no more hidden items. Is that possible that the item have missed his "hidden" property and it's still there or It really wasn't included on KIES backup? Thanks in advance.