USB Harddrive Not Mounting

[Lilone21804]

Im trying to mount my WD Passport, but am having no luck. Whenever I plug it in, nothing happens. When I use the "df -h" it only shows my USB flash drive, but when I use "lsusb" I get this:

Terminal

Bus 001 Device 002: ID 0424:9512 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 010: ID 093a:2510 Pixart Imaging, Inc. Optical Mouse
Bus 001 Device 012: ID 1058:0730 Western Digital Technologies, Inc.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp.
Bus 001 Device 004: ID 0781:556b SanDisk Corp.
Bus 001 Device 005: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
Bus 001 Device 006: ID 05e3:0606 Genesys Logic, Inc. USB 2.0 Hub / D-Link DUB-H4 USB 2.0 Hub
Bus 001 Device 008: ID 04d9:1702 Holtek Semiconductor, Inc.
Bus 001 Device 009: ID 0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter