# Volumes Volumes are virtual disks based on SSD-only, high availability storage devices to serve as your instances system and storage disks. Beside your instances primary Volume you can add multiple additional Volumes to provide additional data storage for Instances. Volumes function as generic block devices, so you can treat attached volumes like locally connected storage drives. This lets you partition, format, and manage volumes with familiar tools and techniques. You can move the Volumes between instances and resize them at any time. ## Snapshots You can take snapshots of Volumes. Volume snapshots save all the contents from the volume, there are 1:1 block storage level copies of a Volume at the moment of creation. Snapshots can be used to revert an Instance back to an earlier state or to create a new instance based on the snapshot. ## Plans and Pricing For pricing details please consult our [pricing page](https://www.cloudbit.ch/pricing/). ## Regional Availability Volumes are available in all regions. They are region-specific resources and can only be assigned to Instances within the same region. ## Limits * To increase an attached volume you have to power-off / shutdown your instance. * Volumes cannot be assigned to more than one instance at a time. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.cloudbit.ch/products/compute/volumes.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.