# NovaBACKUP 21 User Guide This English language document describes the implementation of the core requirements of our customers for NovaBACKUP version 21 only. For reference to other useful product documentation go [here](https://userguide.novabackup.com/novabackup-components/overview-of-the-novabackup-components). It describes the creation, modification and deletion of the most used functions. The individual functions are described in such a way that they can be implemented with the help of this document. Special requirements are not addressed in this document. If you have special requirements, please contact us directly at: OR contact us via our [contact form](https://www.novabackup.com/company/contact?hsLang=en). --- # 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://userguide.novabackup.com/novabackup-21-user-guide.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.