Stopping and Starting EC2 instance wipes data

Hello all,

I recently launched an ec2 instance (m5a-large) and created an additional ebs volume for it at launch based on a snapshot. When I ssh to the instance, I can find all of the data on my home directory. When I stop the instance and start it again, I can no longer find any of my files in my home directory.

I'm not sure why stopping my instance is wiping my data. I would like my files to be present when I stop and start the instance.