I want to present you a small review one of the thinnest 2.5" enclosures with thunderbolt (and USB3.0) port onboard: Freecom Mobile Drive Mg 1TB Thickness: 15mm Price: above 200$ Capacity: Only 1TB HDD Mine came with 30cm USB3.0 and 30cm Thunderbolt cables (both black) The enclosure is only available with "useless" 1TB Samsung HDD, which was immediately replaced by Samsung 840 500GB SSD. In order to open the drive, you need to unstick black plastic front panel. Two philips screws are hidden there and once you remove them, the top part easily slides away. Enclosure works with 9.5mm drives and it's recommended to install some soft padding to prevent thinner 7mm SSD from wiggling. Let's unleash the power of ASMedia 1053 controller (USB3.0 to Sata 6G): Blackmagic Disk Test Write: 295 MB/s Read: 299 MB/s XBench 1.3 AJA System Test Surprisingly, results are slightly below those of Lacie P9223 Slim, which I reviewed here: Lacie P9223 Slim review (USB 3.0) But you're interested in this drive because of Thunderbolt, so here we go: Blackmagic Disk Test Write: 317 MB/s Read: 383 MB/s XBench 1.3 AJA System Test So, the drive is slightly slower than USB3.0-only Lacie and even thunderbolt doesn't help much. The main advantage of thunderbolt for me is more reliable power supply (10W) and a free USB3.0 port on my laptop. If you boot from an external disk, you can't temporarily eject it to free up second USB port. Therefore I prefer to use one thunderbolt port for that. Thunderbolt is also the only option for 2011 Macs to get some fast external storage (they only have USB2.0 or Thunderbolt-to-FW800 option). Magnesium enclosure is very well made and is much lighter than aluminium Lacie. It's also much easier to open. Drive is seriously overpriced just as other TB+USB 2.5" units. It also runs much warmer (TB controller?). Awesome matte black TB cable was included, but it seems to be a special package.