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format file icbu

What is an icbu file and how do I open an icbu file?

ICBU, or iCal backup is a calendar archive created by iCal, a calendar application included with Mac OS X. It contains a backup of one or more calendars, and is used to restore calendars if data is lost.

Mac OS
Recommended icbu file download:
Apple iCal
Detail icbu file extension information:
File Type: icbu
File Format: iCal Backup File
Primary Association: Backup Files