# How Restore Works The core restore process is from a high level perspective: * Figure out what files should be restored * For each file * Locate each block required * For each block * Locate the block volume * Download block volume * Decrypt and decompress block * Append block to file * After file is restored, verify the content matches the original This description is a bit simplified, as it would be incredibly slow to execute in the basic form shown here. For a more developer oriented description, see the forum post on [how the restore process works](https://forum.duplicati.com/t/how-the-restore-process-works/17684). The part about "figuring out what files should be restored" can be described in more parts: * Find the full list of files in the version to restore from * Apply filters to only restore the requested files * Skip files that exists and contains the correct content If there is a local database, many of the steps can be reduced to a database query, and for this reason, Duplicati will build a temporary database during restore, if there is not already a local database. --- # 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://docs.duplicati.com/technical-details/understanding-restore/how-restore-works.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.