What is a CBU file?
A .CBU file is primarily known as a Comodo Backup File created by software from the Comodo Group. These files store compressed copies of user data, system registries, and directories to protect against data loss. Additionally, the .CBU extension is used by Acronis True Image and Cobian Backup software for storing system backups. It is also used as an encrypted device update file for hardware systems like Compute Box and Eye Box.
How to open CBU files?
To restore a Comodo Backup File, you need the Comodo Backup desktop application. If your file was created by other tools, you may need Acronis True Image or Cobian Backup. Standard archive extractors like 7-Zip usually cannot open .CBU files due to proprietary compression and encryption.
Best practices and troubleshooting
Because the .CBU extension has multiple possible meanings, opening a file in the wrong program will cause an error. An encrypted device update file will not load in a backup application. Always verify the origin of your .CBU file before attempting extraction.
Software and tools
Summary
Because a .CBU file can represent different formats, viewer.online/cbu can analyze .CBU files to identify the exact format and creator software, inspect the file structure, extract readable text, and check whether an online preview is available. This makes viewer.online/cbu highly useful for identifying, inspecting, and understanding .CBU files without installing software or dealing with compatibility problems.