FileSystem Lock
FileSystem Lock ensures your application files are in read-only mode. Read-Only mode on your files makes them immune to hacker attacks and hackers can’t make any modifications like inject malware or upload new malware and hacker files.
Secure your files from hackers and malware by locking them from changes.
Working Process
To make an update of your application or a website you would first need to disable FileSystem Lock and then do the update, after the update you should again enable FileSystem Lock.