Windows recognizes files by their extension. For example, your Windows knows that D01BACK.ZDB is a Z-DBackup file because the extension .ZDB was registered for Z-DBackup during installation. If you prefer to use the extension .ZIP for your backup files, you can change the setting with the archive format button in the settings of your backup set:

Backup files are created in the PKZIP format . This option is useful if you just want to transfer your data to another computer. You can then unzip the archive without Z-DBackup.

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