Sometimes your computer is unable to assign drive letters (like C, D, E) to your storage media. For attempting pen drive repair, you don’t need any such accessory. It will not work if you connect it via a device having an SD card slot like a smartphone or a camera.
Use an adapter, if you have a microSD card. How to fix a corrupted SD card or Flash Drive in simple steps? Just in case you’re looking for methods to repair corrupted hard drive as well, you can follow our hard drive repair guide.