USBs not working on 2015-10-03 compilation in a B+

[jaimek16]

More info:

When I write lsusb you can see that the HD is in Bus 001 Device 004 (the western digital)

Terminal

xbian@xbian ~ $ lsusb
Bus 001 Device 004: ID 1058:1230 Western Digital Technologies, Inc.
Bus 001 Device 003: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

but, when I check with "df" the HD is not there

Terminal

xbian@xbian ~ $ df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 256 4 252 2% /dev
tmpfs 36560 236 36324 1% /run
/dev/mmcblk0p2 7440384 668216 6684024 10% /
/dev/mmcblk0p2 7440384 668216 6684024 10% /home
/dev/mmcblk0p2 7440384 668216 6684024 10% /lib/modules
/dev/mmcblk0p1 34730 16664 18066 48% /boot
none 4 0 4 0% /sys/fs/cgroup
cgmfs 100 0 100 0% /run/cgmanager/fs
tmpfs 36560 0 36560 0% /run/user/1000
/dev/mmcblk0p2 7440384 668216 6684024 10% /xbmc-backup

I tried with different HD and same result.
Any ideas??