How to Initialize SSD Windows 10/8/7 in 3 Ways In the Format Partition screen, decide on a drive letter and click 'Next'. Right-click in the area that says Unallocated and begin to create a new volume with the on-screen wizard. Select MBR (Master Boot Record) or GUID partition table (GPT) and click 'OK'. When Disk Management opens, a pop-up will appear and prompt you to initialize SSD. Move your mouse to the lower-left corner of your desktop and right-click on the Start icon, then select 'Disk Management'. A quick guide on how to initialize SSD Windows 10 with Disk Management: