Model Name Model Number Capacity Interface Expansion 2TB Desktop External STEB2000100 2TB USB 3.0 Expansion 3TB Desktop External STEB3000100 3TB USB 3.0 Expansion 4TB Desktop External STEB4000100 4TB USB 3.0 Expansion 5TB Desktop External STEB5000100 5TB USB 3.0 Backup Plus 2TB Desktop External STDT2000100 2TB USB 3.0,USB 2.0 Backup Plus 3TB Desktop External STDT3000100 3TB USB 3.0,USB 2.0 Backup Plus 4TB Desktop External STDT4000100 4TB USB 3.0,USB 2.0 Backup Plus 5TB Desktop External STDT5000100 5TB USB 3.0,USB 2.0 Backup Plus 6TB Desktop External STDT6000100 6TB USB 3.0,USB 2.0 Backup Plus 8TB Desktop External STDT8000100 8TB USB 3.0,USB 2.0 Backup Plus without Hub 3TB Desktop External STFM3000100 3TB USB 3.0,USB 2.0 Backup Plus without Hub 4TB Desktop External STFM4000100 4TB USB 3.0,USB 2.0 Backup Plus Hub 4TB Desktop External STEL4000100 4TB USB 3.0 Backup Plus Hub 6TB Desktop External STEL6000100 4TB USB 3.0 Backup Plus Hub 8TB Desktop External STEL8000100 8TB USB 3.0 Backup Plus Hub Mac 4TB Desktop External STEM4000400 4TB USB 3.0 Backup Plus Hub Mac 8TB Desktop External STEM8000400 8TB USB 3.0