Your Hobby plan supports volumes up to 5GB, and Live Resize is available. To access it, click the volume itself on the project canvas (not the Postgres service's Settings tab), then click the "Live Resize" button. Since your volume is at 100% capacity, the system will automatically perform an offline resize with data integrity checks, which will restart the service and cause brief downtime. Given that you have no backups and Postgres crashed mid-write, we strongly recommend creating a backup immediately after the resize completes and Postgres starts successfully, as WAL corruption is possible when the disk fills during writes.