In standard mode, you can only browse directories, and since no directory exists that contains your drive letters, you cannot browse their list.
emacs- lisp dired.
AFAIK , wmic , .
wmic:
wmic logicaldisk get caption,drivetype,providername,volumename
emacs- lisp .
(let (sh-output volumes)
(setq sh-output (shell-command-to-string "wmic LogicalDisk get Caption,DriveType,ProviderName,VolumeName"))
)
(DriveType: 3 = HDD, 4 = Network Mapping, 5 = Optical.)
, Windows, RET, .
, ...
(let (sh-output volumes)
(setq sh-output (shell-command-to-string "wmic LogicalDisk get Caption"))
)
.