USB Mass Storage Device mount issues

[Carl Thomas]

I am trying to mount a file system that can not be reformatted or
repartitioned, else the necessary files on it would be destroyed with it (I
am using a digital music device which has proprietary software necessary for
its use).

I am getting errors when connecting the device.

*Here is my usbdevs -v:*
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, OHCI root hub(0x0000),
nVidia(0x000$
port 1 addr 2: full speed, power 90 mA, config 1, Dell USB Keyboard
Hub(0x1002$
port 1 addr 3: full speed, self powered, config 1, Dell USB Keyboard
Hub(0x20$
port 2 powered
port 3 powered
port 2 powered
port 3 addr 4: full speed, power 500 mA, config 1, ?umark HDX(0x0001),
?umark.$
port 4 powered
Controller /dev/usb1:
addr 1: full speed, self powered, config 1, OHCI root hub(0x0000),
nVidia(0x000$
port 1 powered
port 2 powered

*here is my dmesg:*
da0 at umass-sim0 bus 0 target 0 lun 0
da0: <Numark HDX 0000> Removable Direct Access SCSI-4 device
da0: 1.000MB/s transfers
da0: 75294MB (154202833 512 byte sectors: 255H 63S/T 9598C)
umass0: BBB reset failed, STALLED
umass0: BBB reset failed, STALLED

On top of all this, the drive, when located in /dev/ is da0, but there's no
partitions on it, making me very confused as to how to be able to put files
onto this drive!

I try mount_msdosfs (because i believe it is a dos file system as per some
clue i got trying to mount it, but i can't remember where... and it just
hangs until i turn off the device.

Can anyone help or at least point me in the right direction? Is there
something i'm missing or is there a tool I can use?

Perhaps mounting it as a raw disk? Any help would be appreciated.

--Carl