---
title: "Upload a block of data for the dataset. The maximum size of the block is 8MiB."
method: PUT
path: "/datasets/{id}/blocks"
tags: ["Custom Speech datasets for model adaptation:"]
---

# Upload a block of data for the dataset. The maximum size of the block is 8MiB.

`PUT /datasets/{id}/blocks`

## Path parameters

- `id` string, uuid, required

## Query parameters

- `blockid` string, required

## Response `201`

The data block was uploaded successfully.

## Other responses

- `default` — An error occurred.

---

[API](https://skmtc.net/azure/apis/cognitiveservices-speech-speechtotext.md) · [All operations](https://skmtc.net/azure/apis/cognitiveservices-speech-speechtotext/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/azure/cognitiveservices-speech-speechtotext/versions/931821089e0d/schema)