Learn how to add space to an existing volume in Windows by extending the volume into available unallocated (empty) space on a disk drive.
How to Shrink or Extend Your Existing Hard Disk Partition Volume
How do I extend a partition in Windows Server?
Fix: Extend Volume Option Greyed out on Windows
windows 7 - Can't extend partition to use free space - Super User
Solved] Server 2019 Cannot Extend Volume - How to Fix It
Shrink Volume Greyed Out in Windows System
Is it possible to extend a partition without losing data? - Quora
How to use diskpart command to extend Server 2003 partition?
3 Efficient Ways to Fix Extend Volume Greyed Out Error
How to Extend C Drive Space on Windows 10 (2020)
The Volume You Have Selected May Not Be Extended in Server 2003 - MiniTool Partition Wizard