When you launch a new instance, there's an option to set up the storage, it's possible that you've missed it. Default is 8 GB.
Now, you have 2 options:
- Increase the size of the already attached volume
- Create and attach a new volume
In both cases, you would go to EC2 -> volumes
Option 1:
- Select the volume that's attached to your instance
- In the upper right, click Actions -> Modify Volume
- There you can set up the new size
- Based on OS, you will have to follow OS-specific steps to increase the file system size: Extend a file system
Option 2:
- Click on a
Create Volume
button in the upper right
- Set up the details (make sure the volume is in the same availability zone as the EC2 instance
- When volume is ready, select it, click on Actions -> Attach Volume
- Choose your EC2 instance
- Based on OS, you will have to follow OS-specific steps to increase the file system size: Extend a file system