What is a key factor when planning for the use of cloud data across multiple providers?

Understanding data export capabilities is crucial when planning for the use of cloud data across multiple providers. This is because the ability to transfer data seamlessly between different cloud services is vital for maintaining flexibility, ensuring interoperability, and avoiding vendor lock-in. When organizations use multiple cloud providers, they often need to move data or share it among these different services. Understanding how to export data, the formats supported, and any potential limitations can significantly affect an organization's ability to manage its data effectively. Additionally, having clear data export capabilities prevents complications related to compliance, data sovereignty, and integration with other systems or applications.

The other aspects mentioned, such as proprietary data formats and having the largest amount of cloud storage, may negatively impact interoperability and flexibility when using multiple providers since they can lead to situations where data is not easily transferable. High network latency is generally undesirable, as it can hinder performance and user experience when accessing cloud resources but does not directly relate to the fundamental planning involved in using multiple cloud data providers.