How to Avoid Speed Loss When Using a USB Pendrive with an Extension Cable

Question:

I use a SanDisk 128 GB Ultra Luxe USB 3.2 pendrive that can reach up to 100 MB/s of transfer speed on any of my USB 3.2 ports. However, when I connect it through a PAXO USB extension cable, which is 1 m long and supports 10 Gbit/s (1.25 GByte/s) of bandwidth for USB 3.2 devices, my transfer speed drops to about 33 MB/s. What is the reason for this significant decrease in speed? Is it because the pendrive does not have its own power supply or is the cable faulty?

Answer:

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> USB pendrives are convenient devices for storing and transferring data, but they can also suffer from performance issues when connected through extension cables. In this article, we will explain why a USB extension cable can affect the speed of a USB pendrive, and what factors can influence the extent of the speed loss. >
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The role of extension cables

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> A USB extension cable is a device that allows you to connect a USB device to a USB port that is not within reach. For example, you may want to use an extension cable to connect a USB pendrive to a computer that is under a desk, or to a TV that is mounted on a wall. Extension cables can also help you avoid bending or damaging your USB ports or devices by providing more flexibility and space. >
> However, extension cables also introduce some drawbacks, especially for high-speed USB devices such as USB 3.2 pendrives. One of the main drawbacks is that extension cables can cause signal degradation and interference, which can reduce the quality and reliability of the data transmission between the device and the host . >
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Signal degradation and interference

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> Signal degradation is the loss of signal strength and quality over distance. The longer the cable, the more signal degradation occurs. This is because the electrical signals that carry the data have to travel through more resistance and capacitance, which can weaken and distort them . >
> Interference is the unwanted noise or distortion that affects the signal due to external factors, such as electromagnetic fields, radio waves, or other nearby cables. Interference can corrupt or alter the data, making it harder for the receiver to decode it correctly . >
> Both signal degradation and interference can result in data errors, which are mismatches between the data sent and the data received. Data errors can cause data loss, corruption, or retransmission . >
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Data loss, corruption, and retransmission

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> Data loss is when some of the data is missing or unreadable. Data corruption is when some of the data is changed or damaged. Data retransmission is when some of the data has to be resent because it was not received correctly the first time . >
> All of these scenarios can affect the speed of the data transfer, as they require more time and resources to complete the transmission. Data loss and corruption can also compromise the integrity and security of the data, making it unusable or vulnerable to malicious attacks . >
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How to minimize the speed loss

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> The speed loss caused by a USB extension cable can vary depending on several factors, such as the length and quality of the cable, the type and speed of the USB device and port, the power supply of the device, and the environmental conditions . >
> Here are some tips to minimize the speed loss as much as possible: >
> – Use a shorter and higher-quality extension cable. The shorter the cable, the less signal degradation and interference occur. The higher the quality of the cable, the better the shielding and insulation, which can protect the signal from external noise and distortion . Ideally, the extension cable should be no longer than 1 m, and should have a USB 3.2 certification. > – Use a powered USB device or a powered extension cable. A powered USB device has its own power supply, such as a battery or an AC adapter, which can provide more stable and consistent power to the device. A powered extension cable has a separate power input, which can boost the signal and reduce the voltage drop along the cable . This can improve the performance and reliability of the data transmission, especially for high-speed USB devices that require more power. > – Use a compatible USB device and port. The type and speed of the USB device and port can affect the data transfer rate and the power delivery. For example, a USB 3.2 device can transfer data up to 10 Gbit/s (1.25 GByte/s), but only if it is connected to a USB 3.2 port. If it is connected to a USB 2.0 port, which can only transfer data up to 480 Mbit/s (60 MByte/s), the speed will be limited by the port. Similarly, a USB 3.2 port can deliver up to 900 mA of power, but only if it is connected to a USB 3.2 device. If it is connected to a USB 2.0 device, which can only draw up to 500 mA of power, the power will be limited by the device. > – Avoid extreme environmental conditions. Extreme temperatures, humidity, dust, or vibrations can affect the physical and electrical properties of the cable and the device, which can degrade the signal and cause errors or failures . Keep the cable and the device away from sources of heat, cold, moisture, dirt, or shock, and store them in a dry and cool place when not in use. >
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Conclusion

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> A USB extension cable can reduce the speed of a USB pendrive by causing signal degradation and interference, which can lead to data errors, loss, corruption, or retransmission. The extent of the speed loss can depend on the length and quality of the cable, the type and speed of the USB device and port, the power supply of the device, and the environmental conditions. To minimize the speed loss, use a shorter and higher-quality extension cable, use a powered USB device or a powered extension cable, use a compatible USB device and port, and avoid extreme environmental conditions. : [https://www.electronics-notes.com/articles/connectivity/usb-universal-serial-bus/extension-cable.php](https://www.electronics-notes.com/articles/connectivity/usb-universal-serial-bus/extension-cable.php) : [https://www.cablestogo.com/learning/library/data-center/usb-3-1-3-0-2-0-cable-distance](https://www.cablestogo.com/learning/library/data-center/usb-3-1-3-0-2-0-cable-distance) : [https://www.usb.org/usb32](https://www.usb.org/usb32) : [https://www.techwalla.com/articles/what-is-a-powered-usb-cable](https://www.techwalla.com/articles/what-is-a-powered-usb-cable) : [https://www.howtogeek.com/165268/why-are-there-different-types-of-usb-cables/](https://www.howtogeek.com/165268/why-are-there-different-types-of-usb-cables/) : [https://www.extremetech.com/computing/115251-how-usb-charging-works-or-how-to-avoid-blowing-up-your-smartphone](https://www.extremetech.com/computing/115251-how-usb-charging-works-or-how-to-avoid-blowing-up-your-smartphone) : [https://www.lifewire.com/how-to-store-usb-flash-drives-2377868](https://www.lifewire.com/how-to-store-usb-flash-drives-2377868)

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