https://en.wikipedia.org/wiki/File_Allocation_Table#Maximal_sizes 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.