If no new drive letter is showing up when plugging in a USB card reader, you may have to manually give the drive a letter using Disk Management.ĭisable read-write protection and see if that fixes the SD card problem. Try closing all programs and have it run idle for a few minutes.Īlternatively, you can use Task Manager (Windows) or Activity Monitor (Mac) to force stop memory-intensive applications. If the USB drive is not recognized and no drive letter is shown in My Computer, it’s possible that your computer is low on memory. These updates are made publically available for download but would often go unnoticed.Ĭard reader’s manufacturer if there are updates available and install if thereĪre any. However, manufacturers would often update their drivers to fix bugs or make improvements to their products. Most USB card readers automatically install drivers when you plug them in for the first time. Resolves most issues that users encounter. Goodie, rebooting the computer is a time-tested solution that surprisingly To look into swapping the USB cable with another one.