Yes, I *used* to do manual partitioning like that 10+ years ago because it was the only way to do it. I've since abandoned that practice for the most part because - especially when installing only one copy of Linux to an entirely blank hard drive - the installers have improved tremendously and it simply hasn't been necessary to do more in that regard. Over the weekend, however, I had a rare opportunity to experiment with multiple installations on a single drive and was trying to explore all six versions of Mint, etc., while learning how to solve the "remove Nouveau / install nVidia" riddle for which there is an embarrassing lack of useful tutorials on the 'net for solving such a mission-critical issue that's been adversely affecting a lot of people during the past couple of years. Anyway... while manually partitioning the drive may have solved my "big picture" problem, it doesn't address the issue of why the KDE installer doesn't provide 3 drive options when 3 drives are available. Both times, it chose an incorrect drive and acted like the other 2 drives didn't exist. That's just wrong.