Final answer:
Use WaImportV2 over WaImportV1 when you need support for larger disk sizes, improved tracking, and compatibility with newer Azure Blob Storage APIs. It offers enhancements that can provide more efficient data transfers to Azure.
Step-by-step explanation:
The Azure Import/Export Service is used when you want to transfer large amounts of data to and from Azure Blob Storage using hard disk drives. The choice between WaImportV2 and WaImportV1 largely depends on the specific features required for your data transfer needs. WaImportV2 is the newer version and includes multiple enhancements over WaImportV1. You would choose WaImportV2 when you require features such as larger disk size support, more robust tracking and logging capabilities, or if you need to work with the latest versions of Azure Blob Storage APIs. On the other hand, WaImportV1 might still be used for legacy applications or systems that are compatible with it.
For most users, WaImportV2 will be the preferred option due to its updated features and improved efficiency. It is important to consult the latest documentation and compatibility notes before starting your import or export job as requirements and best practices can change over time.