Explanation:
Box 1: Export database
Export a database
Dynamics Lifecycle Services (LCS) to export a database from a sandbox user acceptance testing (UAT) environment to the Asset library.
After the export operation completes successfully, sign out of the servicing operation on your Environment details page. You can then see the asset in your Asset Library in the Database backups section.

The .bacpac files are stored here and can be manually downloaded to your Tier 1 developer environments for import.
Box 2: Refresh database
Refresh database
You can use Microsoft Dynamics Lifecycle Services (LCS) to perform a refresh of the database to a sandbox user acceptance testing (UAT) environment. A database refresh lets you copy the transactional and financial reporting databases of your production environment into the target, sandbox UAT environment. If you have another sandbox environment, you can also copy the databases from that environment to your target, sandbox UAT environment.
Reference: https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/database/export-database
https://learn.microsoft.com/en-us/dynamics365/fin-ops-core/dev-itpro/database/database-refresh