pszDeviceName (PSZ) - input

A drive designation or the name of a character or pseudocharacter device.

If it is a drive designation, pszDeviceName is an ASCIIZ string consisting of a drive name followed by a colon. If it is a character or pseudocharacter device name, pszDeviceName is an ASCIIZ string consisting of a file name and the subdirectory, DEV. pszDeviceName is ignored if level 2 or 3 is specified for ulFSAInfoLevel.