Connecting 2nd drive to WD NAS - errors/access problems

if it is FAT32 does that not stop me using files greater than 4gb? I did try formatting it in the MBW however subsequently reformatted it to NTFS as it didn’t seem to make any difference!! Thanks for the tip tho.

Anyone else have any experience of this?? It’s driving me mad - if it had worked i would have been delighted with both hard drives but life is never that simple is it?!!