You are creating an automation that must copy a file from an on-premises shared folder to a Microsoft SharePoint library. The automation must be triggered after a file is created in the shared…

A desktop flow is required because it can interact directly with the on-premises file system, including detecting new files in a shared folder and performing local file operations that cloud flows cannot access natively.

A cloud flow alone cannot access or monitor an on-premises shared folder because it lacks direct connectivity to the local network without a gateway.

Machine registration is used for registering machines to run unattended desktop flows in the cloud but is not a core connectivity feature needed to bridge on-premises file access with SharePoint.

The on-premises data gateway is required to establish a secure connection between the Power Automate cloud service and the on-premises network, enabling the cloud orchestration layer to communicate with and trigger the desktop flow running on the on-premises machine.