VirtualBox is a free hypervisor for x86 computers developed by Oracle.
By default, the drag and drop feature between the host and guest OS is not enabled. However, you can easily activate it.
Activate the Drag and Drop Feature in VirtualBox
Open VirtualBox, select the guest OS > Settings:
Go to General > Advanced. Click the Drag and Drop menu, and make your selection between Disabled, Host to Guest, Guest To Host, and Bidirectional: