http://bugs.winehq.org/show_bug.cgi?id=11754
--- Comment #27 from Stefan Leichter Stefan.Leichter@camLine.com 2009-01-11 16:51:32 --- (In reply to comment #26)
The only thing missing, is the applications ability to detect the SD-card in my USB Card reader.
This is just a wild guess !!
In November 2007 Alexander Morozov posted some patches to recognize devices/drives/disks as removable media. Maybe your problem is related. Sadly the patches did not make it into git.