How Can I Allocate Newly Added Space to an Existing Partition?

Windows

In Windows, if your disk already has, for example, a D: drive and you want to add space to this volume, refer to the following:

The System Disk: Add Additional Capacity to New Volume (C:) and Data Disk: Add Additional Capacity to New Volume (D:) parts in the following section:

Extending Disk Partitions and File Systems (Windows Server 2016)

Linux

In Linux, if your disk already has, for example, partition /dev/vdb1 and you want to add space to this partition, refer to the following:

To extend disk partitions and file systems, see the following sections:
Parent topic: Capacity Expansion