Sometimes a USB device does not appear when you connect it
How to Change Drive Letter in Windows 10
One task you'll likely have to perform a few times in Windows is changing the drive letter for an external hard drive, mapped network drive, or DVD drive. Sometimes a USB flash drive won't automatically be assigned a drive letter when you plug it in, and it may not show up on your computer.
In these cases, you need to change the drive letter for the device and it will normally appear right away. In this article, I will show you how to change the drive letter for these devices using the GUI and also via the command prompt.
You can open Disk Management on a Windows PC by right-clicking the Computer or This PC icon on the desktop and choosing Manage, or by clicking Start and typing diskmgmt.msc.
