Hi barrygb54,
Thank you for the response also.
For the Ethernet cable, yes it should work. For the added storage, do you mean an external hard drive connected through the Surface dock? Yes it will work, the clipboard can still read the hard drive through the dock. If it is the SDcard, it wont since the clipboard doesn't have an SD card slot. unless if you'll connect the SDcard to the dock using an SD card reader.
Kind Regards,
Marrion Y.