Transferring Files Between Two External HDD Drives

[Subtitles]

I needed to transfer about 1TB of videos between two external HDD drives with USB 3 interface (blue USB connector)
My new computer has on the rear of the motherboard (according to the MB user guide) four USB 3.2 Gen 1 ports with blue colours and two USB 3.2 Gen 2 (with green colour)
The green connectors are supposed to be faster than the blue and are are backward compatible.
But when I connected the two HDD's to these connectors, the transfer rate was miserably slow and it would take 1 day to complete the transfer.
I shut down the PC, connected the HDD cables to two adjacent pair of USB blue connectors and the transfer rate is now what I expected fluctuating between 30MB/s to 90MB/s and it should finish the transfer in about 3-4 hours.
I also disconnected all other external HDD's and in both cases I had only the two specific HDD drives.

My question is why the green coloured ports were so slow?

[thecoalman]

Transfer speeds are dependent on what you are transferring. Many small files take a lot longer than one large file.

[krykmoon]

My question is why the green coloured ports were so slow?

Maybe the two Hard Disk are connected to the same controller ?

What is the transfer rate using the blue connectors VS the green connectors ? How many different controllers (green connectors/blue connectors) do you have on your Motherboard ?

If you have only a road connecting two points.. and there are cars coming/going from/to both those two opposite points......

[ProWo]

I needed to transfer about 1TB of videos between two external HDD drives with USB 3 interface (blue USB connector)
My new computer has on the rear of the motherboard (according to the MB user guide) four USB 3.2 Gen 1 ports with blue colours and two USB 3.2 Gen 2 (with green colour)

According to Wikipedia:

Black or White = USB 1.x or USB 2.0.
Blue = USB 3.0
Teal blue = USB 3.1.
Yellow, Orange or Red = USB 3.2 (high current/sleep-n-charge ports).