# copyBytes(to:from:) Copies a subset of the contents of the data to memory. ``` func copyBytes(to pointer: UnsafeMutablePointer, from range: Range) ``` ## Parameters `pointer` A pointer to the buffer you wish to copy the bytes into. `range` The range in the `Data` to copy. ## Discussion > Warning: > This method does not verify that the contents at pointer have enough space to hold the required number of bytes. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)