PCauthorities.com presents…
The File Extension Library

What is a file extension?

Short answer: it's the set of letters after the period (.) in the name of a file.

Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems.

In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file.

Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse!


Browse all Extensions:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
BCK - Extension Details
Date Added: January 01, 1970
File Extension:  .BCK
Description 1: .BCK file extension is linked with BackupExpress Pro File. This is the file extension utilized by BackupExpress Pro a professional software that provides users with a reliable backup to zip archive solutions. The backup files are in a standard Zip format in order for users to access and restore them using any Zip compression tool. It is ideal for Windows XP and Vista users since these operating systems have builtin ZIP file that can support this program.
File Type:   Data File
Mode: ASCII
Program(s) to Open:  Windows: BackupExpress Pro
Common:
Extension: