Total Commander

..dropdown box has this choice but drive button does not
And it is useful for mobile devices connected as MTP...
I'm not using dropdown box at all (I know I could show it with ALT+F1/F2, but for me it's faster with drive buttons...)

cm_OpenDrives In buttonbar (fast mouse access)?
cm_OpenDrives in hotlist or via hotkey (fast keyboard access)?

Thanks MVV, but that's only different way to accomplish this and not exactly my point...

I also would be glad, if more drivebuttons would be added. Unfortunately there are big differences between buttonbar / hotlist and drivebuttons. (There is a button for each panel; it is easy and fast accessable)