This code will allow you get the free disk space on a drive which is over 2 Gb in size. Put all this code into a module
Public Type LargeInt
lngLower As Long
lngUpper As Long
End Type
Public Declare Function GetDiskFreeSpaceEx Lib "kernel32.dll" Alias "GetDiskFreeSpaceExA" (ByVal lpDirectoryName As String, lpFreeBytesAvailableToCaller As LargeInt, lpTotalNumberOfBytes As LargeInt, lpTotalNumberofFreeBytes As LargeInt) As Long
Public Function FreeDiskSpace(ByVal sDriveLetter As String) As Double
'---------------------------------------------------------------------------------------
' Procedure : FreeDiskSpace
' DateTime : 02/01/2004 12:20
' Author : Luke
' Purpose : Returns Free Disk Space using LARGE INT method (Over 2Gb Drives)
'---------------------------------------------------------------------------------------
'
Dim udtFreeBytesAvail As LargeInt, udtTtlBytes As LargeInt
Dim udtTTlFree As LargeInt
Dim dblFreeSpace As Double
If GetDiskFreeSpaceEx(sDriveLetter, udtFreeBytesAvail, udtTtlBytes, udtTTlFree) Then
If udtFreeBytesAvail.lngLower < 0 Then
dblFreeSpace = udtFreeBytesAvail.lngUpper * 2 ^ 32 + udtFreeBytesAvail.lngLower + 4294967296#
Else
dblFreeSpace = udtFreeBytesAvail.lngUpper * 2 ^ 32 + udtFreeBytesAvail.lngLower
End If
End If
FreeDiskSpace = dblFreeSpace
End Function
To use this new module just declare a variable as a double then do this:
Dim dFreeSpace as double
dFreeSpace = FreeDiskSpace("C:\")
Thats it. You will get a value which equals the number of bytes of free space.