# Concatenating byte data in GNU Radio

**URL:** <https://www.ruby-forum.com/t/concatenating-byte-data-in-gnu-radio/262128>\
**Category:** GNU Radio\
**Created:** [November 24, 2021, 12:45pm UTC](https://www.ruby-forum.com/t/concatenating-byte-data-in-gnu-radio/262128 "2021-11-24T12:45:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MubashiraZaman](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/dc4da7/32.png) [@MubashiraZaman](https://www.ruby-forum.com/u/MubashiraZaman)\
**Post date:** [November 24, 2021, 12:45pm UTC](https://www.ruby-forum.com/t/concatenating-byte-data-in-gnu-radio/262128/1 "2021-11-24T12:45:30Z")

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I am reading a binary file from a File Source block, and am receiving some byte data from a UDP Source block. What I want to do is that I want to append the data from file source block to the end of data received in UDP source block. Is there an available block to perform such an action or will I have to create a custom block for this?