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IoT Platform:File management

Last Updated:Jun 21, 2026

IoT Platform allows devices to upload files to Alibaba Cloud IoT Platform for storage via the MQTT protocol or an HTTP/2 stream channel. You can then manage these files in the IoT Platform console, such as downloading or deleting them. This topic describes how to manage files in the console after they are uploaded to the storage space provided by IoT Platform.

Prerequisites

Your device is connected to IoT Platform. For information about device-side SDK development, see Link SDK.

For information about how to compile and configure your device to upload files to Alibaba Cloud IoT Platform, see Upload files by using MQTT.

Limits

The following limits apply when you upload files from a device:

  • You can upload files from devices over MQTT only in the China (Shanghai), China (Beijing), and China (Shenzhen) regions.
  • The total size of files in a single instance cannot exceed 1 GB.
  • A single device can store a maximum of 1,000 files.
  • A single file uploaded from a device by using the MQTT protocol cannot exceed 16 MB.

Procedure

  1. Log on to the IoT Platform console.
  2. On the Overview page, find the instance that you want to manage and click the instance ID or instance name.

  3. In the left-side navigation pane, choose Device Management > Devices. Then, find the device that you want to manage and click View.
  4. On the Device Details page, click the File Management tab.

    On the File Management tab, you can view the list of files uploaded by the device.

    The file list includes the File name, File size, Upload time, and Actions columns. The Actions column provides the Download and Delete actions. The total size of uploaded files and your storage quota are displayed at the top of the page.
    You can perform the following actions on the uploaded files:
    Actions Description
    Download Downloads the file to your local computer.
    Delete Deletes the file.
    Warning Deleted files cannot be recovered. Proceed with caution.

Related APIs

API Description
QueryDeviceFileList Queries a list of all files uploaded by a specific device to IoT Platform.
QueryDeviceFile Queries information about a specific file uploaded by a device to IoT Platform.
DeleteDeviceFile Deletes a specific file uploaded by a device to IoT Platform.