"I guess the question is would that be a copy or you"
good question. I think one can be in two or more places at once and still be the same person. At least one can conceive that would seem hypothetically possible with enough power. Note that even if being the same you wouldn't necessarily have to be aware the copies exist, the copies could be unaware of each other, yet be the same individual without shared memory.
Take for example if you traveled to the past, which may or may not be possible, if you travel to the past. That was you in the past, and it is you also who are the time traveler, but the past you is unaware of the future you. In fact you could have amnesia and not be aware of past you while past you is not aware of future you. Could also work if you came from the future to the present, it would be you but you wouldn't know nor share working memory.
That said, more knowledge is needed of the nature of consciousness, because the idea of simultaneous copies being you leads down quite a deep rabbit hole.
