From the manufacturer

 
  My Cloud Home My Cloud Home Duo
Perfect for Keeping content from all your devices stored in one place at home and accessible anywhere. Keeping all your stored content saved twice and accessible anywhere.
Capacity 2 TB – 6 TB 4 TB – 16 TB
Quick and simple setup with your phone, tablet or computer ✓ ✓
My Cloud Home mobile, desktop and web access ✓ ✓
Auto photo and video backup for phones ✓ ✓
USB 3.0 ports for importing content 1x 2x
Mirror Mode (RAID 1) for two copies of all your content ✓
PC/Mac ready (no formatting required) ✓ ✓
Automatic backup for PCs and Mac computers ✓ ✓
LED indicator light ✓ ✓