1. When you are logged into Galaxy your used disk space over the total available disk space is shown in the upper right corner. This tutorial shows you how to increase the disk size when you are close to capacity. The instructions are the same for command-line users, but you would use the “df -h” command to see your data disk size.
2. First, stop your instance.
3. Next, go to Volumes and select the largest volume of the instance in question. Find that instance by looking under Attachment Information.
4. Select that Volume and under Actions, choose Detach Volume.
5. Now, create a snapshot from this volume.
6. While your snapshot is being created, go to your Instances and check the Availability Zone of the instance in question.
7. Once the snapshot is done, we will create our new, larger capacity volume. Go to Snapshots, choose your newly created snapshot and under Actions choose “Create Volume”. Type in whatever larger size you want for your new volume (up to 16384 GiB), and then make sure you choose the same Availability Zone as the instance from the previous step.
8. Once the new volume is made, you need to attach it to your existing instance. Click on Volumes. Select your new volume and under Actions, choose Attach Volume.
9. When you click in the Instance text box, it will give you a drop-down of possible instances to choose from in that Availability Zone. Make sure you choose the instance that you detached the volume from. Leave the Device as is. Click Attach.
10. The final step is to go back to Instances and start up your instance. The instance may take a few extra minutes to start up because it will need to prepare the larger volume file system. Once Galaxy is up and running, log in and you should see (in the upper right corner) that the capacity of the disk has increased (or use “df -h” on the command line). Finally, make sure to delete your old volume and snapshot.