USB是一种广泛采用的技术，它允许我们每天将大量设备插入我们的计算机。尽管设置起来很容易，但有时并不是所有的即插即用。当您的USB^(USB)驱动器不显示时，您会怎么做？

这可能是由多种不同的原因引起的，例如USB 闪存驱动器损坏或死机^{(dead USB flash drive)}、过时的软件和驱动程序、分区问题、错误的文件系统和设备冲突。硬件故障、系统控制器死机或USB端口等其他原因需要设备制造商或经过认证的计算机技术人员提供专业帮助。

虽然很难确定您的计算机无法识别USB记忆棒的确切原因，但您可以尝试各种可能的解决方案，直到它再次工作为止。

我们收集了一些在您遇到USB连接问题时可以使用的有效解决方案。其中大部分也适用于需要通过USB连接的不同设备，例如磁盘驱动器、鼠标、视频游戏控制器等。

另外，请查看我们的YouTube 短视频^{(short YouTube video)}，我们将在下面介绍一些解决方案。如果您收到USB Device not Recognized 错误^{(USB Device not Recognized error)}，我们也有解决方案，请查看链接。

如何修复未显示的插入式 USB 驱动器^{(How To Fix a Plugged-In USB Drive Not Showing Up)}

• 初步检查
• 检查设备兼容性
• 更新您的操作系统
• Windows 疑难解答工具
• 使用磁盘管理工具
• 尝试插入其他计算机或USB端口
• 驱动程序疑难解答
• 使用设备管理器^{(Use Device Manager)}扫描硬件更改
• 创建^(Create)新的驱动器卷并分配驱动器号
• 禁用USB 选择性挂起^{(USB Selective Suspend)}功能

初步检查^{(Preliminary Checks)}

• 检查您的 USB 设备是否已打开^{(Check That Your USB Device Is On)}。当您将USB记忆棒连接到计算机时，理想情况下它应该会自动打开，并且设备上的闪烁灯会指示活动。有些设备有专用的电源线或物理电源按钮，您必须手动打开，以便计算机检测到它。
• 检查 USB 记忆棒是否有裂纹^{(Examine The USB Stick For Cracks)}。闪存驱动器可能在您不知情的情况下损坏，因此请在重试之前进行物理检查以排除任何问题。
• 重新启动您的计算机^{(Restart Your Computer)}。这可能是一个旧的技术支持备用，但它解决了很多问题，尤其是那些由软件故障引起的问题。拔下USB记忆棒，关闭计算机并将其从电源上拔下。最多等待一分钟，然后重新启动计算机并再次尝试闪存驱动器。
• ^{(Allow Your Computer To Load)} 再次尝试USB记忆棒之前，请让您的计算机完全加载。^(Fully)一些计算机可能会很慢，并且在启动期间必须运行的多项操作使它们不堪重负，因此您的USB记忆棒可能会被忽视。

检查设备兼容性^{(Check For Device Compatibility)}

如果您的USB记忆棒不适用于您的计算机，则插入时它不会显示。在Windows PC^{(Windows PCs)}中，大多数USB 3 设备都可以连接到USB 2端口，这应该不是什么麻烦。 

但是，随着技术的进步，USB 3设备可能需要更强大和兼容的端口才能工作。在重试之前，请查看设备的说明手册或包装以获取兼容性信息。

更新您的操作系统^{(Update Your Operating System)}

如果您使用的是Windows，更新操作系统会附带支持不同硬件和设备的重要文件，以及对您可能遇到的任何错误的修复。

• 打开Settings > Update & Security。

• 单击检查更新^{(Check for Updates)}。如果有任何待处理的更新，请下载并重新启动计算机，然后再尝试使用USB记忆棒。

使用磁盘管理工具^{(Use Disk Management Tool)}

此工具检查Windows是否会检测到您的U^(USB)盘。它还向您显示连接到 PC 的所有硬盘，您可以查看分区、大小等信息。

• 插入您的U^(USB)盘并右键单击Start > Disk Management。 
• 检查^(Check)主磁盘或辅助磁盘下的U^(USB)盘。如果它不包含分区，它将显示为Removable。

• 如果您在磁盘管理^{(Disk Management)}实用程序中看到它，您可以创建一个新卷并分配一个驱动器号。通过这种方式，您可以对闪存驱动器进行分区或格式化，以便其他设备（包括您的 PC）轻松检测到它。
• 如果您的USB驱动器未显示，则可能是驱动程序或硬件问题，或者驱动器已死。

尝试插入不同的计算机或 USB 端口^{(Try Plugging Into a Different Computer Or USB Port)}

从当前端口和计算机上拔下U^(USB)盘，然后尝试插入不同的计算机和/或USB端口。如果它在新的USB端口或计算机上正常工作，则USB 端口可能已损坏或死机^{(USB port may be damaged or dead)}，或者计算机本身可能有问题。

有故障、损坏或死机的USB端口会出现问题，例如无法检测USB驱动器或显示错误消息。检查端口是否清洁、无尘、牢固。如果它上下移动或感觉松动，则说明它有故障/损坏。

如果您使用的是USB集线器，请从集线器上拔下记忆棒并将其直接插入您的计算机。某些集线器的电源不足以使外部驱动器正常工作，您的情况可能就是这种情况。

如果USB驱动器即使在尝试不同的端口、计算机或检查磁盘管理^{(Disk Management)}后仍未显示，则驱动器可能已损坏，需要更换。

驱动程序疑难解答^{(Troubleshoot Drivers)}

您可以使用设备管理器^{(Device Manager)}对驱动程序问题进行故障排除，尤其是当您的USB记忆棒被另一台计算机检测到而不是您正在使用的计算机时，这表明存在驱动程序问题。

• 右键单击Start>Device Manager.

• 展开磁盘驱动器^{(Disk drives)}并检查任何列出的设备旁边的黄色感叹号。如果有一个或多个带有此标记，则设备存在驱动程序问题。

• 右键单击^{(Right-click)}有问题的设备并选择属性^(Properties)以查看相关的错误消息。您可以在线搜索错误以找到问题的解决方案

您还可以尝试以下解决方案来解决驱动程序问题：

• 回滚驱动程序^{(Roll back the driver)}以恢复到最近的驱动程序更新并将设备恢复到正常运行的时间。
• ^{(Download drivers)}从设备制造商的网站从下载页面、支持页面下载驱动程序，或在网站上搜索正确的驱动程序。
• ^{(Update the driver)}通过在设备管理^{(Device Manager)}器中右键单击驱动程序来更新驱动程序，选择更新^(Update)驱动程序并按照提示进行操作。
• 从您的计算机上卸载^{(Uninstall )}设备，重新启动它并等待它重新安装正确的驱动程序和配置。

使用设备管理器扫描硬件更改^{(Use Device Manager To scan For Hardware Changes)}

• 右键单击开始^(Start)并选择设备管理器。^{(Device Manager.)}
• 单击Action > Scan for hardware changes.

Windows 将尝试查找您的U^(USB)盘，以便您再次访问它。

重新安装 USB 控制器^{(Reinstall USB Controllers)}

此方法有助于USB驱动程序不稳定或损坏的情况。

• 右键单击Start>Device Manager并单击通用串行总线控制器^{(Universal Serial Bus controllers)}以展开列表。

• 右键单击您的设备并单击卸载^(Uninstall)，然后重新启动计算机以自动重新安装控制器。

创建新的驱动器卷并分配驱动器号^{(Create a New Drive Volume & Assign a Drive Letter)}

如果您的设备出现在磁盘管理^{(Disk Management)}步骤中，您可以创建一个新的驱动器卷并分配一个驱动器^{(assign a drive letter)}号。磁盘管理^{(Disk Management)}工具修复了不同驱动器的分区和文件系统问题。

但是，您的USB记忆棒可能只显示未分配^{(Unallocated)}空间，在这种情况下，您必须创建一个新分区，以便Windows和其他操作系统可以使用它。

• 右击Start>Disk Management，右击Unallocated space>New Simple Volume，按照提示创建分区。

如果您仍然看不到闪存驱动器，但它已分区，请确保它具有驱动器号。理想情况下，这应该是自动的，但如果您手动删除它，则不会在Windows中检测或访问该驱动器。

• 右键单击驱动器的分区，然后单击更改驱动器号和路径^{(Change Drive Letter and Paths)}。

• 如果它没有分配的驱动器号，请单击添加^(Add)并选择一个字母。如果它有一个字母，请单击更改^(Change)并选择一个不同的字母。

禁用 USB 选择性挂起功能^{(Disable USB Selective Suspend Feature)}

这是一种省电设置，可通过在插入USB记忆棒时切断其电源来帮助减少电池使用。为确保您的驱动器不会因任何原因断电^{(powering down for any reason)}，请禁用此功能，以便电源管理设置不会覆盖USB 控制器^{(USB controller)}，这使得Windows无法检测到它。

• 单击开始^(S)art>Control Panel 并选择硬件和声音。^{(Hardware and Sound.)}

• 单击Power Options>Change plan settings.

• 单击更改高级电源设置。^{( Change advanced power settings.)}

• 转到USB 设置^{(USB settings)}并展开它。 
• 单击USB 选择挂起设置^{(USB selecting suspend settings)}并将插入^{(Plugged in )}下拉菜单更改为禁用^{(Disabled )}（注意：如果您使用的是笔记本电脑，请单击电池^{(On battery)}并在下拉菜单中更改为禁用）。^{(Disabled )}

• 单击Apply>OK并重新启动计算机以使更改生效。

如果一切都失败了，您可以更换您的USB记忆棒作为最后的手段，但如果驱动器已经损坏，您可以这样做。否则，我们希望本指南有助于简化此过程，并且您现在知道当您插入 USB^(USB)驱动器时没有出现时该怎么办。

What to Do When Your USB Drive Is Not Showing Up

USB is an extensivеly adopted technology that allows us to plug lots of devices into our computerѕ every day. Although it’s quite easy to set up, sometіmes it’s not all plug and play. What do you do when your USB drive is not showing up?

This can be caused by several different things such as a damaged or dead USB flash drive, outdated software and drivers, partition issues, wrong file system, and device conflicts. Other causes like faulty hardware, a dead system controller, or USB ports require professional assistance from your device manufacturer or a certified computer technician.

While it’s not easy to pinpoint the exact reason why your computer won’t recognize the USB stick, you can work through various possible solutions until it works again.

We’ve rounded up some effective solutions that can work when you’re experiencing USB connection issues. Most of these also apply to different devices such as disk drives, mice, video game controllers, and more, which require a connection via USB.

Also, check out our short YouTube video where we go through some of the solutions down below. If you’re getting a USB Device not Recognized error, we have a solution for that too, so check out the link.

How To Fix a Plugged-In USB Drive Not Showing Up

• Preliminary checks
• Check for device compatibility
• Update your operating system
• Windows Troubleshooter tool
• Use Disk Management tool
• Try plugging into a different computer or USB port
• Troubleshoot drivers
• Use Device Manager to scan for hardware changes
• Create new drive volume and assign a drive letter
• Disable USB Selective Suspend feature

Preliminary Checks

• Check That Your USB Device Is On. When you connect your USB stick to your computer, it should ideally turn on automatically with flashing lights on the unit indicating activity. Some units have a dedicated power cable, or physical power button that you have to turn on manually, for your computer to detect it.
• Examine The USB Stick For Cracks. It’s possible that the flash drive could have been damaged without your knowledge, so check it physically to rule out any issues before trying again.
• Restart Your Computer. This may be an old tech support standby, but it fixes a lot of issues, especially those caused by software glitches. Unplug the USB stick, shut down your computer and unplug it from the power source. Wait up to one minute before restarting your computer and trying the flash drive again.
• Allow Your Computer To Load Fully before trying the USB stick again. Some computers can be slow and get overwhelmed by the multiple operations they have to run during startup, so it’s possible that your USB stick might be getting overlooked.

Check For Device Compatibility

If your USB stick isn’t meant to work with your computer, then it won’t show up when you plug it in. In Windows PCs, most USB 3 devices can connect to USB 2 ports, which shouldn’t be much trouble. 

However, with advances in technology, a USB 3 device may require a more powerful and compatible port to work. Check your device’s instruction manual or packaging for compatibility information before trying again.

Update Your Operating System

If you’re using Windows, updating the operating system comes with important files that support different hardware and devices, plus fixes to any errors you may encounter.

• Open Settings > Update & Security.

• Click Check for Updates. If there are any pending updates, download and restart your computer before trying your USB stick again.

Use Disk Management Tool

This tool checks whether Windows will detect your USB stick. It also shows you all the hard disks connected to your PC, and you can review information like partitions, sizes, and more.

• Plug in your USB stick and right-click Start > Disk Management. 
• Check for your USB stick under primary or secondary disks. If it doesn’t contain partitions, it’ll appear as Removable.

• If you see it in the Disk Management utility, you can create a new volume and assign a drive letter. This way, you can partition or format the flash drive to make it easily detectable by other devices, including your PC.
• If your USB drive is not showing up, it could be a driver or hardware issue, or the drive is dead.

Try Plugging Into a Different Computer Or USB Port

Unplug the USB stick from the current port and computer, and try plugging into a different computer and/or USB port. If it works on the new USB port or computer, the USB port may be damaged or dead, or the computer itself may have a problem.

A faulty, damaged or dead USB port presents problems such as failure to detect USB drives or displays error messages. Check if the port is clean, dust-free, and firm. If it’s moving up and down or feels loose, then it’s faulty/damaged.

If you’re using a USB hub, unplug the stick from the hub and plug it directly into your computer. Some hubs have insufficient power for external drives to function, which may be the case with yours.

If the USB drive isn’t showing up even after trying a different port, computer, or checking in Disk Management, the drive is probably dead and needs to be replaced.

Troubleshoot Drivers

You can troubleshoot driver issues using Device Manager, especially if your USB stick is detected by a different computer other than the one you’re using, signaling a driver problem.

• Right-click Start>Device Manager.

• Expand Disk drives and check for a yellow exclamation point next to any of the listed devices. If there’s one or more with this mark, then the device(s) has a driver issue.

• Right-click on the problematic device and select Properties to see the related error message. You can search for the error online to find a solution to the problem

You can also try the following solutions to resolve driver issues:

• Roll back the driver to revert to recent driver updates and restore the device back to a time when it was functioning properly.
• Download drivers from the device manufacturer’s site from the downloads page, support page, or by searching on the site for the right driver.
• Update the driver by right-clicking on the driver in Device Manager, select Update driver and follow the prompts.
• Uninstall the device from your computer, restart it and wait for it to reinstall the right driver and configurations.

Use Device Manager To scan For Hardware Changes

• Right-click Start and select Device Manager.
• Click Action > Scan for hardware changes.

Windows will try to find your USB stick so you can access it again.

Reinstall USB Controllers

This method helps where the USB driver is unstable or corrupted.

• Right-click Start>Device Manager and click on the Universal Serial Bus controllers to expand the list.

• Right-click your device and click Uninstall, and then restart your computer to reinstall the controllers automatically.

Create a New Drive Volume & Assign a Drive Letter

If your device appeared in the Disk Management step, you can create a new drive volume and assign a drive letter. The Disk Management tool fixes partitioning and file system problems with different drives.

However, your USB stick may show only Unallocated space, in which case you’ll have to create a new partition so that Windows and other operating systems can use it.

• Right-click Start>Disk Management, right-click on the Unallocated space>New Simple Volume and follow the prompts to create a partition.

If you still can’t see your flash drive, yet it’s partitioned, make sure it has a drive letter. Ideally, this should be automatic, but if you removed it manually, the drive won’t be detected or accessed in Windows.

• Right-click the drive’s partition and click Change Drive Letter and Paths.

• If it doesn’t have an assigned drive letter, click Add and pick a letter. If it has a letter, click Change and choose a different one.

Disable USB Selective Suspend Feature

This is a power-saving setting that helps reduce battery use by cutting power to your USB stick when it’s plugged in. To ensure your drive isn’t powering down for any reason, disable this feature so that power management settings don’t override the USB controller, which makes Windows not detect it.

• Click Start>Control Panel and select Hardware and Sound.

• Click Power Options>Change plan settings.

• Click Change advanced power settings.

• Go to USB settings and expand it. 
• Click USB selecting suspend settings and change the Plugged in drop-down menu to Disabled (Note: If you’re using a laptop, click On battery and change to Disabled in the drop-down menu).

• Click Apply>OK and restart your computer to effect the changes.

If all else fails, you can replace your USB stick as a last resort method, though you can do this if the drive is already broken. Otherwise, we hope this guide has helped ease the process, and you now know what to do when your USB drive isn’t showing up when you plug it in.

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