Allocation unit size control: Adjust the cluster size for optimal file allocation on your formatted partitions.It is designed specifically for Windows XP which struggles more than any other OS to exceed FAT32's limitations but in our testing works elsewhere as well. Some operating systems software or experiments only require or support FAT32. This is the GUI version of the popular FAT32format command-line utility that's also available. Format large hard drives up to 32GB in FAT32įAT32format GUI is a disk formatting utility designed to format discs larger than 32 GB with the venerable FAT32 file system.