What is a locker?

To put it simply, a locker looks like a secure folder that holds your encrypted files. 

When you encrypt a file, we add it to the .locker folder. .locker is a file format that facilitates the processing of data within our cryptosystem.

No one except you can access the files you put in a Locker unless you give access to other people through the Add user access option in the NordLocker application.