Trying to transfer files from my 2012 MacBook Air to my nTB MacBook Pro 13. I like to start from fresh each time and just transfer the files I need. I have an old 1TB WB external HD that I've had for years. I added my 173GB photo library from my MBA. Now it's plugged into to my MBP with the USB-C adapter. I moved the file to my computer and it's saying it'll take 2 days. It said 11 days to start, then 12 days, and now as I type this 2 days. Is it slow cause of the USB connection? Is there a better way to do this?