WD 3TB My Passport Wireless Pro Portable External Hard Drive - WiFi AC, SD, USB 3.0 - WDBSMT0030BBK-NESN Supported Operating Systems: Windows 10, Windows 8 or Windows 7 operating systems Mac OS X El Capitan, Yosemite, Mavericks or Mountain Lion operating systems DLNA/UPnP or Plex-enabled devices for streaming Default/ Max. Memory: 512MB Interface: USB 3.0 / WIFI Port USB: 1 x USB3.0 + 1 x USB 2.0 Port Others: 1 x SD card slot Built-in 1x1 Wireless-AC Cache: 256MB Power: AC input voltage (AC adapter): 90-260VAC AC input frequency: 47-63Hz Temperature: Operating: 0°C to 35°C Non-op: -20°C to 60°C