Compressed files are those that contain one or more files that have a reduced size, but are still used by Windows like any other regular file.
When you open a compressed file, Windows decompresses it automatically. Later on, if you close it, the file gets compressed again, therefore taking up less hard drive space.
The algorithm repeats each time you open and close compressed files. Among the various types of file extensions, ZIP compression files have increased in popularity.
Files can be sent and received so much easier, which is ideal if you frequently work with media files and don’t like the idea of killing all your bandwidth in the process.