Excellent near new condition.  Works perfectly.  There are 4 - 1 TB SATA HDD drives in the bays. 

• Mini Pegasus2 is a 4-Bay RAID 5/6 storage solution featuring 2.5" drives
• 4TB model offers portability for over an hour of uncompressed 4K footage
• Designed for users who require a portable, “on-the-go” solution in remote or offsite environments
• Blistering performance for creative professionals creating high-resolution video and rich media content
• Maximizes the available line rate of Thunderbolt™ 2
• Video creators, photographers, graphic artists, and engineers alike can transfer and display 4K video files simultaneously at lightning speeds
• Use for streaming, editing, and backup
• Dual Thunderbolt™ ports for daisy chaining Pegasus2 enclosure units, Apple Thunderbolt™ displays, or Mini DisplayPort devices
• Removable drive bays for effortless drive access and serviceability