Disk management is a tool to manage disk space, such as splitting into smaller parts called partitions or volumes!
Unlike the internal file manager MS-Explorer, or alternative Windows file explorer is not file management and is more of a task for advanced users. On Windows 10 and earlier, Disk Management is an integrated Windows utility that lets you manage not only disks but all of your computer's storage devices without using third-party software.
Of course, the functionality is not very diverse, but the main tasks to manage drives can be done.
But I have already written a lot:
With a computer data storage, whether hard drive SSD, or USB stick, known as a logical drive, partitions are a single accessible storage area, with a single file system!
A volume is not the same as a partition. For example, a disk can be a volume, even though it does not contain a partition. Although a volume is on a hard disk, it can be accessed using, for example, disk management of the operating system. So a volume is not the same as a partition. It should rather be regarded as a container.