.FLK File Extension

Encrypted "locker" file created by Folder Lock, a program used to protect files and folders; stores a collection of files and folders that are encrypted by the software and password-protected with a user-supplied password; protected using 256-bit AES encryption.

FLK files are used for safeguarding information on computer hard drives and USB drives. They may not be deleted from computers that have Folder Lock installed. Additionally, they may only be unlocked and opened using the correct password.