Why Is Acces Denied to My USB?

USB technology was introduced in 1996.

USB ports and devices make connecting to another computing device convenient. USB technology has been around since 1996, and is a feature found on most modern computing devices. If your device is denied access to one of its USB features, do some troubleshooting to isolate and resolve the problem.

Viruses

Some computers come with a security feature that automatically denies access to a USB device, such as a flash drive, if harmful content is detected. Installing an anti-virus software application and regularly scanning the computer and any connected USB devices can help you avoid experiencing denied access to a USB device. Avoid opening USB flash drive files that you cannot identify or do not recognize, as these types of files are how viruses find their way onto unprotected computers.

Incompatibility

Inserting an incompatible device into your computer’s USB port can also cause you to be denied access to your device’s USB features. For instance, if your computer supports USB 1.0 technology and you insert a USB 2.0 or USB 3.0 connector, the computer can experience interfacing problems that may cause a "USB access denied" prompt or situation. If other USB devices begin to malfunction after inserting an incompatible USB cable into your computer, turning the computer off and back on again may resolve the situation.

Formatting

USB flash drives, also known as pen or thumb drives, are among the most common types of USB devices used in conjunction with computers. Most USB flash drives are formatted using one of three types of formatting methods: FAT16, FAT32 or NTFS. If you've formatted a USB flash drive using one method, used it on the computer and then reformatted the drive using another method, you can be denied access to the flash drive through the computer’s USB port. Wiping the flash drive clean and reformatting it again can resolve this type of problem.

Considerations

Many computer accessories, including printers and pointing devices, connect through the machine’s USB ports and can interface interchangeably with multiple computing devices. This feature increases the risks of picking up viruses and experiencing unauthorized reformatting. Limiting the amount of computers your USB devices accesses can help you avoid these situations. Damaged USB cables can also make it impossible to access USB devices when they are connected to your computer. USB cable damage usually occurs at the points where the cable and its connectors meet. Replace any damaged USB cables.

References

• Webopedia: USB