Data Robotics DroboPro FS Bedienungsanleitung Seite 37

Simply type the name of the share and the number of gigabytes (GB)
you want the maximum size of the Time Machine share to be. If desired,
you can also create the share on Volume 2 (DroboPro FS only.) Note
that if you decide at a later date to change the size of the Time Machine
share, you will have to delete the existing share and create a new one,
thus losing all data in the original share. Please plan accordingly.
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