First things first, let’s plug in our drive and find out the device ID FreeNAS assigns it.
# dmesg ... umass1: <ASMedia AS2105, class 0/0, rev 2.10/1.00, addr 3> on uhub4 da1 at umass-sim1 bus 1 target 0 lun 0 da1: <ST950042 0AS 0002> Fixed Direct Access SCSI-0 device da1: 40.000MB/s transfers da1: 476940MB (976773168 512 byte sectors: 255H 63S/T 60801C)
Now we create a mount point for the drive and try mount it like we normally would.
You’ll receive the following error:
# mkdir /mnt/usb # mount -t ntfs /dev/da1s1 /mnt/usb/
fuse: failed to open fuse device: No such file or directory
Now lets load the fuse driver and try again.
# kldload fuse # mount -t ntfs /dev/da1s1 /mnt/usb/ # ls -l /mnt/usb total 4589868 drwxrwxrwx 1 root wheel 4096 Sep 25 17:48 $RECYCLE.BIN drwxrwxrwx 1 root wheel 0 Nov 27 14:25 .Trashes -rwxrwxrwx 1 root wheel 4096 Nov 22 18:15 ._.Trashes ...
It’s probably easier to load the driver on boot instead of loading it manually like I have above. I haven’t tried it, but it should work if you call it from loader.conf. I can reboot my NAS at the moment, but if someone wants to give it a shot and post to the comments, that would be great. You can follow instructions on how to edit loader.conf in a previous post  of mine.