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[This is preliminary documentation and subject to change.]
Requirement (Designed for Microsoft® Windows® Logo)
Your application should not assume a 2 GB hard-disk size limit.
On drives larger than 2 GB, FAT32 is the only file system on Windows that allows the user to format the disk as a single partition.
On Windows 98, the existing Win32 function, GetDiskFreeSpace, may obtain incorrect values for volumes that are larger than 2 GB; whereas GetDiskFreeSpaceEx obtains correct values on all platforms for all volumes, including those that are larger than 2 GB. New applications should use GetDiskFreeSpaceEx instead of GetDiskFreeSpace.