My Android phone was recently stolen, so will the thief have access to all my pictures in the thumbnail folder? I have hidden the pictures in an app called Vaulty so will they still be visible in Thumbnail folder (I mistakenly removed the file manager from my phone a day before the phone was stolen)? Please help me out with this ! :(
If your memory card is not encrypted then your images and other data is not safe from the thief. Vaulty simply hides files, not protect and encrypt them.
But then again, most thieves are only after the money. Mostly likely they will find a way to reformat your phone, delete all contents, and sell it as refurbished/used on ebay.
If you think the phone might still be on / not deactivated, you could try installing Plan B from Lookout Mobile. There are other apps that you can remotely load and wipe your memory card remotely so the thief cannot access your photos. However if the thief has since removed your memory cad, he can unfortunately access your photos.