This worked for me :
what I used : external 5 tb Samsung d3 station
xbox 360, trinity, slim rgh 2 dash 2.0.17349.0
Programs : MiniAide Fat32 Formatter Home Edition 1.05
MiniTool Partition Wizard Professional Edition
Procedure: first delete all partitions on hd, then create a new partition fat32 selecting default cluster size on MiniAide Fat32 Formatter Home Edition 1.05 , closed the program then open MiniTool Partition Wizard Professional Edition and format the fat32 partition selecting 64kb cluster size, that's it, you can install a 2 disk game creating a content/0000000000000000 folder inside the hard drive. Good luck