 The FAT32 boot sector uses a 32-bit field for the sector count, limiting the maximal FAT32 volume size to 2 tebibytes (approximately 2.2 terabytes) with a sector size of 512 bytes.The maximum FAT32 volume size is 16 TiB (approximately 17.6 TB) with a sector size of 4,096 bytes.Windows operating systems through Windows 10 create new FAT32 volumes only up to 32 GB in size, however.