Files that contain the .tar file extension are TAR archive files that have been created by the TAR file archiving utility. The TAR utility is a Unix-based utility that combines multiple files into a single archive folder.
The TAR file format makes the storage and distribution of a large volume of files more convenient and manageable. Instead of adding 20 different file attachments to an email, you can combine all 20 files into a single TAR archive and attach that single archive attachment to the email message.
TAR files are not always compressed, although compression of TAR files is possible.
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