Seagate FreeAgent GoFlex 1.5TB Portable USB 3.0 HDD

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The FreeAgent GoFlex 1.5TB measures 120 x 89 x 22 mm (or 4.7 x 3.5 x 0.9 inches) and weighs 0.44 kg (just under 1 lb). The top of the enclosure is composed of smooth glossy plastic while the bottom has a rougher matte surface. Despite its high capacity, which might require more power to spin-up, the included 18 inch USB cable has only one connector, not two, as sometimes supplied to ensure adequate power via the USB.

With USB 3.0 adapter detached, the drive's SATA interface is revealed. The opening is too cramped for a regular SATA data and power cable.

Connector for the USB 3.0 cable.

Once attached, the modular controller is slightly loose, but difficult to dislodge accidentally. A pair of white LEDs light up when a USB 3.0 connection is established.

The GoFlex's modular nature also makes the adapter useful in other ways. It can be used with any 2.5" SATA hard drive without the external housing. But 3.5" drives require more power to spin up than is provided by USB.


Test Platform:

Testing tools:

File Transfer Suite:

  • Small Files: 1,250 small HTML, JPEG, and MP3 files totaling 871MB.
  • Large Files: Four large AVI files totaling 4194MB.
  • Huge File: One MKV file, 3799MB in size (not really "huge" but generates similar MB/s results as single 10GB+ sized files)

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