AWS Snowball Edge now supports block storage volumes of up to 10 TB, ten times higher than the previous limit of 1 TB. A higher volume size limit provides you greater flexibility when using block storage with your applications on Snowball Edge.

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/10/aws-snowball-edge-now-supports-volume-sizes-of-up-to-10-tb/