If you have the Central Admin Server Option (CASO) or the SAN Shared Storage Option installed, you can share backup-to-disk folders between computers.
See About sharing backup-to-disk folders.
To share an existing backup-to-disk folder
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On the computer on which you want to add the folder for sharing, on the navigation bar, click Devices.
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Right-click the server on which you want to add the folder for sharing.
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On the shortcut menu, click Add Shared Backup-to-Disk folder.
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Type or browse to the path of the shared backup-to-disk folder that you want to add to this computer.