A:AnswerYes it can. The physical interface is the same - and the spee is controlled on this model by which port it is plugged into.
Below are from the specs for this 2014 product.
Includes:
Two USB 3 ports (up to 5 Gbps)
Thunderbolt port (up to 10 Gbps)
A:AnswerWho knows? Its not actually from Best Buy and when it doesn’t arrive, like mine didn’t, their surly customer support reps will tell you it’s not their problem and they aren’t going to do anything about it
A:AnswerYes. The cable (whether USB-C or Apple thunderbolt 3) is a data transfer cable capable of file data, viseo, and music data. Data is a very broad term but the simple anser is yes.
A:AnswerDo NOT buy this for eGPU purposes. This cable is listed as Thunderbolt 2-compliant, which can very much be only half as performant (max 20Gbps) as a Thunderbolt 3 (max 40 Gbps) cable. You will want the TB 3 cable to maximize your eGPU performance.