Maybe this might help somebody else. I got a FAT32 partition working on my Seagate 3TB external under the following conditions. The FAT32 partition is formatted to a 32 KB cluster size (256 KB did not work), the partition is under 1 TB (over 1 TB was not detected for me), I have two FAT32 partition & I can alter between them by converting between logical & primary. Currently the logical partition is being detected. I use Easus for my partitioning, NTFS compatibility was unsuccessful for me. MMOS would freeze when I clicked on the PFS driver folder in the explorer window.