---
title: "Download a trial when some sensors are not connected"
canonical: "https://help.vicon.com/space/IMU/73110422/Download%20a%20trial%20when%20some%20sensors%20are%20not%20connected"
format: markdown
---
If you can't connect all the sensors that were used for collecting data because you used more sensors that you have USB ports, connect the sensors to the available USB ports. You will be able to connect the remaining sensors later.

> ⚠️ **Important**
> ⚠️ 
> ⚠️ - If you are interested in only the raw data, you may download trials with only 1 sensor connected.
> ⚠️ - If you want to align sensors within a trial, you must have at least 2 sensors connected.

**To download a trial when some sensors are not connected:**

1. Connect sensors to the available USB ports on your computer (see [Connect sensors to Capture.U Desktop](https://vicon-help.atlassian.net/wiki/spaces/IMU/pages/73121980)).
2. Select **Process** and on the **Captures** tab, notice that connected sensors are displayed in blue and sensors that are not connected are displayed in gray.
  This example shows a trial that was collected with two sensors, but with only one of the sensors connected.
3. Under **Select trial to download**, click **Edit & download** to the right of the required trial.
  On the **Preview** tab, a message warns you that not all sensors are connected.
4. Edit the trial if required (see Step 3 in [Download a trial from the sensors](https://vicon-help.atlassian.net/wiki/spaces/IMU/pages/73134174)). To ensure data formatting is consistent, any cropping of the data of the connected sensors is automatically applied when you connect the remaining sensors.
5. When you have finished any editing, click **Download**.
  When the trial has been downloaded, it is labeled **Partially Downloaded**.
6. Connect the remaining sensor(s) to the computer.
7. Select the trial.
  On the **Preview** tab, notice that the **Crop** button is unavailable, to ensure the data is formatted in the same way as the previously connected sensors.
  If you cropped the trial when you connected the first set of sensors, the trial is automatically cropped in the same way as the previously connected sensors.
8. Click **Download**.
  When data from all the sensors has been downloaded for the associated trial, green check marks are displayed for each sensor.