First 2 photos are of actual item, is 2× 2TB hard drives in the one case, So total of 4GB capacity

Its formatted as exFat and more suitable for Windows than a Mac.

Features: portable 2.5'' hard drive SATA hdd storage, plug and play.

• Ultra slim and compact size, perfectly fit your palm, easy to carry.
• With shockproof, waterproof and anti-scratch design. The LED indicator can monitor storage activity briefly.
• It can be used as extra storage device for game console controller, laptop, desktop computer, surveillance cameras. Provides ample storage space for your music, movies and other files. Specification:
• Size: 1307512mm / 4.8x2.8x0.4 inch
• Material: PC
• Color:Blue
• Capacity: 4TB broken up into 2 2TB drives
• Caching: 8MB
• Speed: 5400RPM
• Working temperature: 32°-140°F(0°-60°C)
• Indicator: High Refective Blue LED Indicator Package Includes: 1 *Portable External Hard Drive 1 *USB Cable Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.