Solid Explorer - Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.
KeepSafe - Keep your entire photo library safely stored in an encrypted private cloud.
Amaze File Manager - Free and open-source Android file manager with no ads.
Hide Secrets - Hide Secrets is an app that allows hiding everything they deem confidential on their smartphone.
Total Commander - A Shareware file manager for Windows® 95/98/ME/NT/2000/XP/Vista/7, and Windows® 3.1.
Hexlock - Security app locker keeps apps private with smart profiles for any situation