The volume were my camera stores the photos (A:/DCIM/) is not shown in Lightroom import. I always have to select the drive letter (A:) and include subfolder manually. Also most of the other volumes under source are useless. There will never be photos on my temp or scratch volume.
How do I edit the Source lists permantently?
See this post for some options: Re: Re: Use of "A" and "B" as drive letters. Please add your opinion and vote to this topic in the official Adobe feedback forum: Lightroom: Display A & B Drive letters in Import Destination on Windows.