Question: how long does it take to transfer 1tb over usb 2.0?
Answer: USB 2.0 has a raw data rate of 480Mbps, but the fastest typical usage usually tops out around 40 MB/s. Given that a terabyte has 1,048,576 megabytes, you just do the math. If you could achieve the theoretical 60 MB/s transfer, you could do it in slightly over 4 hours and 45 minutes.