I am quite certain than you can't go direct from the Digi-001 to the drive itself. A quick look into the the Digi-001 (specs shown below) does not mention a firewire interface. I would think if it had one, it would be splashed across every ad. I don't think a device that I described above exists yet.
I think the package is 'kitted' like that so:
1. you have a drive fast enough to do recording.
2. the advantage of maybe taking the drive elsewhere - your friend house, a studio etc.
Digi 001 specs
Analog Inputs:
2 ch. mic/line inputs (XLR or 1/4") bal/unbal w/-26dB pad, 48V, gain control, high-pass filter@ 75Hz
6 ch. line inputs (1/4" TRS) bal/unbal w/ software controlled gain
44.1kHz/48kHz sample rates
Dynamic Range: 98dB (input Ref. = +16dBV for ch. 1-2, +4dBV for ch. 3-8)
THD + N: 0.003% (relative to 1kHz @ -0.5dB, 20Hz - 22kHz)
Frequency Response: +/- 0.5dB (relative to 1kHz, 20Hz - 22kHz)
Input Impedance: Ch. 1-2: 3.1 kOhm pad out (mic/line) Ch. 3-8: 20 kOhm
Headroom: 14dB
Analog Outputs:
Main Output: ch. 1-2, +4dBu, balanced (1/4" TRS) outputs
Monitor Output: ch. 1-2, balanced (1/4" TRS) outputs w/ gain control
Line Outputs: ch. 3-8, -10dBV unbalanced
44.1kHz/48kHz sample rates
Dynamic Range: 98dB (DAC Output Ref. = 0dBFS)
THD + N: 0.003% (relative to 1kHz @ -0.5dB, 20Hz - 22kHz)
Frequency Response: +/- 0.5dB (relative to 1kHz, 20Hz - 22kHz)
Output Impedance: Ch. 1-8: 20 Ohm
Monitor Outputs: 50 Ohm
Headroom: 14dB
Headphone Output:
Stereo with 1/4" TRS connector with gain control
Maximum output level: + 17dBV @ 600 Ohm
Digital I/O:
2 ch. S/PDIF (24-bit), 44.1kHz/48kHz
8 ch. ADAT Optical* (24-bit), 44.1kHz/48kHz