This manual refers to an old version of CodeTwo Backup. Go here if you use the latest version.

Data storage

Data storage characteristics

CodeTwo Backup keeps the backed-up data in a local resource referred to as storage. A storage consists of a folder tree that resembles the structure and versioning of the backed up mailbox or SharePoint site. All items backed up by the software are saved as binary files. That means that – contrary to common text formats – it is not possible to view the files’ contents using a text editor (e.g. MS Notepad), but it is possible to view them in CodeTwo Backup. Those binary data files are accompanied by .xml configuration files and .sdf files (MS SQL Server Compact databases that contain items' metadata as well as contents' indexes). Storage files are encrypted by default. Additionally, the main administrator can enable storage password protection for these files to prevent other, less privileged admins from viewing the backed up items in the software’s Administration Panel.

CodeTwo Backup enables you to create multiple storages and share them between multiple jobs – several various jobs can back up data to the same storage. Also, data from one job can be restored by a different job to a different server. It is also possible to back up Exchange and SharePoint data to a single storage.


For safety reasons, we recommend backing up data from different sources to separate storages. In addition, it is also not possible to back up public folders from two Exchange environments (both Office 365 and on-premises) to the same storage.

Storages can be easily archived via archive and PST archive jobs. However, in this version of the program, archiving is only available for Exchange and Office 365 data. If a storage contains also backed-up SharePoint data, only the Exchange / Office 365 contents will be archived.

Backup - Using different Storages.
Fig. 1. Different jobs using multiple storages to create and restore backups.

Storage limitations

The only substantial limitation of the storages in CodeTwo Backup is their location. The software allows you to choose only a local resource as a storage location. It is not possible to point to a network drive when creating a new storage. Such a possibility was prohibited on purpose to make sure that the fastest and the most reliable drive (i.e. a local one) is used as the storage location. Network drives are unfortunately prone to connectivity failures, they may be also characterized by unsteady transfer speeds or might even drop connections. Fortunately, you can archive storage data to an external resource.

See also

Managing backup storage - this article describes how to manage storages (create a new storage, edit, mount, remove or archive an existing storage, monitor the storage status).

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