WARRKY USB A 3.0 hub expands one USB 3.0 port from your laptop or desktop to four with no driver needed, backward compatible with USB 2.0, USB 1.1. It is compatible with all mainstream OS like Windows, Mac OS, Linux. Split one USB-A from your source device (laptop, desktop, PlayStation 4/5, car, etc.) into four ports for peripherals such as USB flash drive, mouse, keyboard, game controller, speaker, webcam. 

* Hub not powered, not designed for charging.

1. Restart the devices and make sure all connections are tight.
2. Port failure:

- Physical damage. Change to another USB port of your device. For desktops, use the USB ports backside. Connect a peripheral to the port directly without the hub to see if the port is broken.

- Dirty. Use a spray gun to blow away the dust. Do not use water or a damp cloth.

3. Update BIOS and Chipset Driver.

4. Type "troubleshooter" in the Windows "Start Search" box to start the hardware troubleshooter.

Bluetooth devices use a specific radio frequency (2.4G) while USB 3.0 is allowed to use conflicts with the specific frequency Bluetooth devices all use, which means any USB 3.0 port, cable or device can emit radio frequencies that may cause interference with any Bluetooth devices you are using, leading to the potential degradation in performance of the Bluetooth device.

This hub adopts an industry-grade chip solution rather the common consumer-grade ones prevail on the market, and during lab test it performs a much higher level of stability. Should you experience latency of your Bluetooth device, try to avoid inserting Bluetooth receiver into an adjacent port to the USB 3.0 devices. For example, you can plug your Bluetooth keyboard receiver to Port 1 (of the four ports) and plug your USB 3.0 drive to Port 4. If they still interfere with each other, you would have to plug the receiver directly to the PC.

Please kindly note that for stable connection, do not exceed 900mA total current. So daisy chain is not recommended.

1. According to USB 3.0 industry standard, to ensure stable connections, connected devices should not exceed a total current of 900mA. Devices are usually rated as image;
2. Clean the ports. Dust accumulation weakens the connection.
3. Check if the port is physically damaged.

WARRKY thunderbolt 3 to USB hub compatible with MacBook Pro 2016-2021, iMac 2017-2021, MacBook Air 2018-2021, iPad Pro 2018-2020, Surface Book 2 / 3, Surface Book 2/3, Dell XPS 15/13, Samsung Galaxy S20/S10/S9/S8, Note 10/9/8, LG V40/V35/V30/V20, and many other smartphones/laptops/tablets.

1. Please make sure your android device supports OTG (On-The-Go) function.
2. This is a plug-and-play card reader, but some Android devices disable data transfer over USB-C ports by default. In this case, you need to turn on USB Debugging Mode manually to enable your device to exchange data over its USB-C port.

• Click "Settings"-> "About device"-> Tap "Serial number" or "Builder number" seven times to make "Developer options" available in "Settings". 
• Go back to "Setting"-> "Developer options"-> Turn on "USB Debugging"

Bluetooth devices use a specific radio frequency (2.4G) while USB 3.0 is allowed to use conflicts with the specific frequency Bluetooth devices all use, which means any USB 3.0 port, cable or device can emit radio frequencies that may cause interference with any Bluetooth devices you are using, leading to the potential degradation in performance of the Bluetooth device.

This hub adopts an industry-grade chip solution rather the common consumer-grade ones prevail on the market, and during lab test it performs a much higher level of stability. Should you experience latency of your Bluetooth device, try to avoid inserting Bluetooth receiver into an adjacent port to the USB 3.0 devices. For example, you can plug your Bluetooth keyboard receiver to Port 1 (of the four ports) and plug your USB 3.0 drive to Port 4. If they still interfere with each other, you would have to plug the receiver directly to the PC.

Please kindly note that for stable connection, do not exceed 900mA total current. So daisy chain is not recommended.

1.According to USB 3.0 industry standard, to ensure stable connections, connected devices should not exceed a total current of 900mA. Devices are usually rated as image:

2. Clean the ports. Dust accumulation weakens the connection.

3. Check if the port is physically damaged.