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Both checkboxes under the "Devices" section should be selected unless it is specifically addressed by the user who will be using the backup service.
In the Users tab, the defaults are used unless the user who will be using the disk safe requests otherwise.
Should such a request arise, simply select the appropriate change from the dropdown box which is required and select the value.
In the Limits tab, the defaults may be used for the "Options" and "Data Retention" sections. The "Quotas" section however must be filled out before creation.
As backup space is sold in 50 GB increments, the minimum hard quota of a disk safe must be 50 GB. Should the user increase their storage, the new total which they will be receiving must be set as a hard quota. The soft quota can be a custom amount but is generally set to 2 GB less than the hard quota.
Once the quotas have been set, click create. The disk safe has been successfully created.