:| Number of Total Expansion Bays: 1| Number of 5.25" Bays: No| Number of 3.5" Bays: No| Number of 2.5" Bays: No| Number of 2.5"/3.5" Bays: 1| Number of 1.8" Bays: No| Wireless LAN: No| Drive Interface: Serial ATA/600| Host Interface: USB 3.0| Form Factor: External. .