You can create either a hard quota or a soft quota:
For more information on working with Disk Quotas, please visit this Microsoft TechNet article.
Increase your Disk Quota limit via Quota Manager
In Quota Templates, select the quota template that you want to modify.
Right-click the quota template, and then click Edit Template Properties (or in the Actions pane, under Selected Quota Templates, click Edit Template Properties). This opens the Quota Template Properties dialog box.
Perform all necessary changes. The settings and notification options are identical to those that you can set when you create a quota template. (For more information, see Creating a Quota Template earlier in this guide.) Optionally, you can copy the properties of a different template and modify them for this one.
When you are finished editing the template properties, click OK. This will open the Update Quotas Derived from Template dialog box.
Select the type of update that you want to apply:
Move the affected volume's Shadow Copy to a different volume. Please note, you may need a create a small volume in Disk Management to complete this task.
Repeat steps 5 and 6 for additional volumes using Disk Quota that cannot create a Shadow Copy