The ToughTech Duo QR portable 
storage system  from CRU-Dataport features a two-drive RAID array that packs large  capacity and high performance into a tiny yet rugged package that’s easy  to setup and use. The device is designed for professional photographers  and digital media artists who need to carry and protect their digital  assets while out on the field or in the studio. 
 
Hardware
The ToughTech Duo QR model that we got to test sports dual 750GB hard  drives for a total capacity of 1.5TB if configured as RAID 0. The hard  drives are speedy at 7200RPM and compact at 2.5-inches in size. They are  also easily swappable from the front-loading trays without the need for  screws, although the drives can be screwed down to the trays for  environments where extra stability is required. To remove a tray, you  simply slide the black latch to unlock, which will reveal a red circle,  and then you press in on the lid of the tray to pop it out.  

The compact aluminum chassis measures only 6.3-inches by 3.5-inches  by 1.3-inches and weighs roughly 1.75lbs. It’s built tough to withstand  vibration and shock and also uses a passive thermal 
design  for optimal heat dissipation without an internal fan. The large LCD  display on the side of the device offers temperature status, monitors  drive health, and allows you to configure RAID mode. On one side of the  LCD is a black rubberized circular navigation control with four buttons,  while the other side has three LED indicators for Power, System, and  RAID. 

Ports are located on the back side of the ToughTech Duo QR and  include two FireWire 800 ports with FireWire 400 backwards  compatibility, one eSATA/USB 2.0 combo port, and a power jack just below  the power on/off switch.  There’s also a small slot designed to work  with a Kensington security cable lock. 

The device pretty much comes with all the cables and 
power adapters  that you’ll need. Included in the box are two FireWire 800 cables, one  USB 2.0 cable, one eSATA cable, and an AC adapter with swappable prongs  for outlet compatibility all around the world, accepting 100-240VAC.  There’s also an aluminum stand with rubberized grips that you can use to  hold the ToughTech Duo in an upright orientation. The device can also  just lie flat on its side, if you opt not to use the stand.
 
Performance
The ToughTech Duo performed well with fast read speeds thanks to the  7200RPM hard drives and a fast Oxford 936 chipset. We first tested the  device with a USB 2.0 connection and a RAID 1 configuration, meaning  that the device would be writing the same information to both drives in  real-time. With this setup we were able to transfer a file that was  2.28GB in 1 minute and 10 seconds, which translates to about 32MBps.  Transfetring the same file back to our 
computer took slightly less time. 
Performance results were very similar in a RAID 0 configuration. With  the FireWire 800 connection, speeds for the same 2.28GB file  transferred in about 43 seconds, which translates to about 53MBps. The  nice thing about the FireWire 800 is that the device can be bus-powered  by this connection, but not so via USB 2.0 or eSATA connections. Hence,  for either of those two setups, you will need to also hook up the AC  power adapter. 
Wrap-Up
The ToughTech Duo QR is a great high capacity portable external 
hard drive  that’s rugged, compact, and offers a simple to use RAID 1 solution  along with easy-to-swap hard drive trays. Its tough chassis and small  size makes it very convenient for traveling, while its small footprint  and sleek design make it a welcome and unobtrusive addition to the  studio as well.  It also comes with a slew of connector cables, power  adapter heads, and optional small screws for clamping down the drives to  the trays when extra stability is needed.
The only complaints might be its lack of a USB 3.0 port and USB bus-power 
support.  The device is also a bit costly with prices starting at $499, although a  look around shows that our model with the two 750GB drives lists for  about $763. Although costly, the device can be a good choice for a media  professional that demands portability, ruggedness, large capacity, and  easy-to-use reliable data protection and redundancy.