The taskbar isn’t just for apps and documents. With just a few seconds work you can pin drive icons there, too.
Right-click an empty part of the desktop, select New > Text File, and rename the file to drive.exe. Drag and drop this onto your taskbar, then delete the original file.
Right-click your new “drive.exe” taskbar button, then right-click its file name and select Properties. Change the contents of both the Target and Start In boxes to point at the drive or folder of your choice, perhaps click Change Icon to choose an appropriate drive icon, and you’re done – that drive or folder is now available at a click.