A knowledge base article about Adding a new disk to a Windows vm provided by the UC Berkeley IT Service Hub - Knowledge Portal
Use the following quick guide to add a new disk to your Windows vm
Send a request to cloud-ticket@berkeley.edu. Include the name of the virtual private server as it appears in vSphere along with the size and storage tier of the disk to be added.
Log into your server and launch Disk Management as an administrator once a Cloud team member adds the disk. Run a rescan if you don’t see your new disk automatically.
Right click the disk you want to add and select Online
Right click the disk again and select “Initialize Disk”
Select a partition style option and click Ok
Right click the unallocated volume and select “New Simple Volume”. This will launch the new disk wizard.
Click Next
Click Next
Select the drive letter assignment and click Next
Select your format options and click Next
Click Finish