Back up your important data first. I won't be held responsible for any loss of data. This guide writing for DMS 6.1.3, use a single HDD.   >>> Proceed at your own risk! <<<<   Power off your XPE. Insert a new HDD (equal or greater capacity). Power on your XPE. Change RAID type: Open "Storage Manager" >>> RAID Group >>> Manage >>> Change RAID type >>> RAID 1 >>> Drag & Drop the new