Copy multiple USB drives— Computer, usb hub, duplicator?

When it comes to USB duplication, we usually do it with a computer. Almost every PC ship with USB ports. By plugging USBs into computers, you can easily copy files. It’s the easiest and non-cost way and usually used by most people.
But what if you have to copy multiple USB?
You may find out that it was incredibly slow and it cannot copy files for special use such as copying a bootable USB without using software or having professional skills.
Today, we’re gonna focus on the hardware, helping you to choose the right gadget.

1. Using a computer to copy multiple USBs

‧Slow transfer speed
One of the common reasons is that the anti-virus program checks every file and it will eventually slow the speed down.

‧Transfer speed start fast and then slow down
If the transfer speed starts fast but drops down after a few seconds or minutes. The reason might because write cache is filling up. Once the cache fills up, the transfer speed will go down to match the physical writing speed.

‧Time-consuming and tedious
A computer with a single CPU core cannot multitask as it only executes a single thread at a time. Therefore, even you load all of the USB ports on your computer, the computer just switches the process between them very quickly. For example, you drag-and-drop files to 3 USBs on your computer, the resources will be equally allocated to this three USBs, which means more USB you copy, more time you need.

In addition, if you copy and paste manually on the computer, you need to focus on the processes to see whether it has repeat or broken files, which will make the whole process stop.

2. Using a USB hub to speed up the process

Compare to using computer ports, this can save lots of repeat work. The cons are the speed will still slow down with the increasing number of slots because each device must be verified separately through the single-stream USB channel.
2020 best-rated USB hub on Amazon: Sabrent, Anker

3. Using a USB duplicator is a time-saving choice

The difference way between computer and duplicator while storing data

On the other hand, the duplicator copy bit by bit(sector by sector), not only you will have the same file but there will be arranged in the same physical order, including free space and any fragmentation that was on the drive.

That means the old data stored in the drives will be covered by the one in the source. It will be exactly the same as the source drive, even the file system, so you don’t have to format it additionally, the duplicator has done it already.


As for the duplicator, you don’t have to transfer files by using the computer or installing software to complete it. It can save time in manual work and do it automatically till it finished. It’s like the easiest and efficient way to copy, expansive though. It’s more suitable for people who use it for mass production.

Innovade is a freelance writer covering tech, DIY and topics about data copying and transferring.