Files with the .011 file extension are most commonly associated with split archive file volumes. File compression and archiving utilities can be used to combine a large batch of files into a single file archive. This archive can then be split into separate volumes, making it easier to distribute the files online or save the files across multiple storage disks. When these volumes are created, each volume is given its own file extension in sequence, such as .001, .002, .003, etc. The .011 file extension is normally given to the eleventh volume of the split file archive. In order to extract the contents from the file archive, all of the volumes must be present.
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