Usb 2 Data Transfer Rate. A charging cable supporting usb 20 can be longer than usb 3x and usb4 cables but is limited to a 480 mbps data transfer rate and will not support. Usb 32 released in september 2017 preserves existing usb 31 superspeed and superspeed data modes but introduces two new superspeed transfer modes over the usb c connector with data rates of 10 and 20 gbits 125 and 25 gbs.

Try to use usb 3 cables and plugs as it has a maximum data transfer speed of 5 gbps compared to usb 2s slower 480 mbps. This file transfer time calculator is used to determine the approximate time that a file would take to transfer over a particular interface. The actual data transfer rate depends on many different factors.
The increase in bandwidth is a result of multi lane operation over existing wires that were intended for flip flop capabilities of the usb c.
Usb 20 to tebibyte per second tibs 000005457. Usb 20 transfers data at a top speed of 480 megabits per second mbps while usb 30 can. Given that a terabyte has 1048576 megabytes you just do the math. The whole thing only works if all drivers are correct and all components take part in this data transfer.