I tested the Thunderbolt Drive+ with both Thunderbolt and USB 3.0. With the former it was tested with a new Macbook Pro (late 2013 model), the latter was done with a Windows computer. With both, it offered unprecedented real-word copy speeds.
When used with Thunderbolt, the drive offered the sustained speed of 284MBps for writing and 308MBps for reading, by far the fastest I've seen for portable Thunderbolt drive. It's not the fastest Thunderbolt storage device, but just trails behind the recently-reviewed, which is an advanced RAID system. Note that when used with older Thunderbolt-enabled Macs, however, its performance was a little slower, slightly less than 200MBps. This means, if you really want to have the best performance, you need to get the latest Mac.
With USB 3.0, it registered 243MBps and 290MBps for sustained writing and reading, respectively. Note that the Windows test machine also use SSD as its internal drive, if you use the Thunderbolt Drive+ with a USB 3.0-enabled computer that uses a regular hard drive as its internal storage, the copy speed will be much lowered since the computer's storage is the bottleneck.
All in all, the Thunderbolt Drive+ offered superb performance for a compact portable drive. In fact it can rival the speed of other high-end advanced RAID storage system. In my testing, the drive also stayed cool during and worked without any hiccups.
The Thunderbolt performance of this Elgato is outstanding and impressive, even when compared to much more advanced storage devices. However, what makes this drive special is its unprecedented USB 3.0 speed. It's by far the fastest to date, even faster -- faster than the , which is a desktop drive with special caching. This means end users can now tab into real-time HD video editing kind of performance without having to invest in Thunderbolt, but rather just a decent computer with USB 3.0. In all, if superfast performance and portability are what you need, look no further than the Elgato Thunderbolt Drive+.