Because Echo Show devices run on a cloud-based system, you don't need to worry about storage space. You can add new capabilities using these three methods: Can You Download Apps on Echo Show
The short answer is that you don’t "download" apps on an Echo Show in the traditional sense you would on a phone. Instead, you which function like cloud-based apps. While most Echo Show models do not have a dedicated App Store, they come pre-loaded with native software for major services like Netflix and Prime Video. 1. How to Enable Skills (Echo Show "Apps") download apps on echo show