What is the term for storage in the cloud allocated as an attached drive to a virtual machine?

The term for storage in the cloud allocated as an attached drive to a virtual machine is commonly referred to as "Volume Storage." This type of storage allows for the provision of storage space that can be directly attached to virtual machines, enabling them to operate with specific data and applications seamlessly. Volume storage is typically used for applications that require a file system or for databases where performance and persistent storage are critical.

In cloud environments, this storage type often takes the form of disks (EBS volumes in AWS, for example) that can be formatted with file systems and mounted directly to instances. This capability supports more dynamic and scalable architecture, where the volumes can be resized, moved, or detached as needed.

The other storage types listed serve different purposes: Block Storage is a more general term that includes Volume Storage but can refer to raw storage blocks without an attached file system; Object Storage is designed for unstructured data and is accessed via APIs rather than mounted on virtual machines; File Storage operates using file systems and is designed for sharing files over a network but does not necessarily align with the concept of being attached as a drive to a virtual machine.