Storage similar to the Western Digital My Book Live Duo 4TB

• Large storage capacity
• Cheap, RAID 0/1 or JBOD

• Easy, tool-less swapping of 2.5-inch drives
• Fast read/write performance depending on the installed drive

• Nice design and construction
• Removable drives an be used as portable drives
• Thunderbolt cable included

• Limited features
• Slow transfer speeds

• 2.5-inch drives only

• Hard drive speeds hinder Thunderbolt performance
• Can't use drives as portable devices if configured as RAID 0 or RAID 1 in dock

It's easy to insert drives into or remove drives from the miniSwap/U3, and it also provides good USB 3 performance.

The G-Dock ev features removable drives that can be used as portable hard drives.