If you have your Seestar powered on, in Station Mode, and connected to a WiFi network, you should be able to connect to the drive inside the Seestar using a Windows File-Explorer going to "\\Seestar" (a network share). Then you can not only copy, but also move and delete files. If you connect to it in parallel with the Seestar App, you should also be able to prevent it from shuting down due to inactivity after a while, as the file transfer might take a while.