File and Folder Lock Folder Lock is an Android application that works to satisfy the needs of the security conscious users. File and Folder Lock provides much-needed features like password protection of photos and videos, secured wallets, data recovery, decoy mode, stealth mode, hack attempt monitoring and more! File lock : Folder Locker app is your personal Locker where you can keep your most memorable files and ensure that friends who use your phone don’t see your personal files, if they bro