# Add storage to a virtual computer in Lightsail for Research
<a name="attach-disk"></a>

Complete the following steps to attach a disk to a virtual computer in Lightsail for Research. You can attach up to 15 disks to a virtual computer. When you attach a disk to your virtual computer using the Lightsail for Research console, it is automatically formatted and mounted by the service. This process takes a few minutes, so you should confirm that the disk has reached a **Mounted** mounting status before you start using it. By default, Lightsail for Research mounts disks to the `/home/lightsail-user/{{<disk-name>}}` directory; where `{{<disk-name>}}` is the name you gave your disk.

**Important**  
Before you can attach a disk to a virtual computer, the virtual computer must be in a *Running* state. If you attach a disk to a virtual computer while it’s in a *Stopped* state, the disk will be attached but fail to mount. If the disk's **Mount status** is *Failed*, you must detach the disk then reattach it when the virtual computer is in a *Running* state.

1. Sign in to the [Lightsail for Research console](https://lfr.console.aws.amazon.com/ls/research).

1. Choose **Virtual computers** in the navigation pane.

1. Choose the computer to attach the disk to.

1. Choose the **Storage** tab.

1. Choose **Attach disk**.

1. Select the name of the disk to attach to the computer.

1. Choose **Attach**.