High-Speed Thumb Drives

Thumb Drives With ThunderBolt Interface

ThunderBolt Keychain Flash Drives

A few years back, Intel showed a prototype ThunderBolt flash drive brought out from the depths of their labs for a public viewing at an electronics show. And that was the last we saw of it. Major storage manufacturers never entered this category of PC and Mac backup devices. Back in the days before SuperSpeed USB 3.0 and 3.1, we briefly saw FireWire 400/800 flash drives from OCZ and Kanguru that marginally outperformed their USB 2.0 counterparts in that era. The big issue for a Thunderbolt flash drive is the $50-$75 price premium ThunderBolt entails. The extra cost of the ThunderBolt chipset and it's licensing requirements isn't cost-justifiable in the eyes of many consumers.

Intel Thumb Drive Prototype Smallest ThunderBolt Drive So Far
Intel ThunderBolt Interface Flash Memory Drive Tiny ThunderBolt SSD

Dimensions: 3" x 2.5" x .65"

PCIe Thunderbolt SSD Flash Drive

A slim, flash drive shaped option from Transcend pairs an ultra-fast NVMe PCIe fash module with a narrow Thunderbolt enclosure and a short cable. It supports 10 GBps Thunderbolt 1 & 20Gbps Thunderbolt 2 ports of legacy Macs prior to 2016 which have mini DisplayPort style Thunderbolt ports.

Thunderbolt 1 & 2 Compatible Drive

High-Speed NVMe PCIe SSD Module


USB-C ThunderBolt 3 'Compatible' Flash Drives

The ThunderBolt thumb drive market that has yet to really materialize is being made somewhat moot by the arrival of the Type-C ThunderBolt 3 interface on new Apple Mac's and Windows PC's. Using the SAME connector as USB-C and with the ability to 'Tunnel' USB 3.1 Gen2 protocols over the Thunderbolt3 bus, consumers will be able to plug a USB-C flash drive into a ThunderBolt3 port and may not really notice or care about the performance differences.

"Thunderbolt 3 COMPATIBLE" is a term being widely used for 10GPbs USB3.1 Gen2 (sometimes called USB 3.2) storage devices that use USB protocols when plugged into a Thunderbolt 3 port.

USB-C (& A) Ultra-Fast Flash Drive

SATA 3 - Speeds To 550MBps


For even higher performance, PCie NVMe modules in a slim USB-C enclosure like shown below can push Read/Write performance up around 950MBps to more fully saturate the USB 3.2 pipeline.

DIY USB-C Flash Module Enclosure

For M.2 NVMe PCIe SSD Cards


Below, more flash drive makers are adopting the Type-C interface -- but most don't benchmark Reads/Writes quite as as fast as a solid-state drive with a more advanced controller would deliver.

Fast USB 3.1 Thumb Drive Cheap USB 3.1 Thumb Drive
Samsung USB-C & A Flash Drive

Dual Interface : 300MBps Speed
SanDisk Ultra USB-C Flash Drive

16GB - 128GB Capacitiess

With USB 3.1 Gen 2's increased bandwith to 10Gbps, only the most high-end keychain type drive using PCIe NVMe SSD modules can fill the USB 3.1 Gen2 pipeline anyways. Expect to simply see alot of marketing billing USB 3.1 Type-C flash drives as 'ThunderBolt 3 COMPATIBLE' although they'll be functioning using somewhat slower USB protocols.

USB3 vs ThunderBolt Flash Drive Speeds and Costs

Perhaps some of the reasons for the delay in ThunderBolt flash memory drives reaching the market is the Price / Performance benefits (and more accurately, the lack thereof.) It would take some serious price reductions in the cost of licensing ThunderBolt chipsets to justify much of a market for ThunderBolt keychain style drives.

As we've seen in the desktop, portable and pocket-drive SATA interface SSD markets, 5Gbps SuperSpeed USB 3.0 bandwidth can pretty much handle the maximum data transfer rates of the most current and fastest USB3 thumb drives quite easily. So there's little point in paying more for a ThunderBolt keychain drive to achieve near identical performance over cheaper USB 3 products.

With the top performing USB 3.X flash drives from companies like SanDisk and Patriot currently maxing out with peak Read / Write speeds slightly over 300MB/s, the NAND flash memory itself -- and not the computer interface is still the limitation. Substituting a significantly more expensive ThunderBolt chipset with direct access to the computer's PCIe bus for a USB 3.0 or 3.1 controller chip wouldn't make the flash memory any faster. At best you might see a trivial, minor increase in performance simply because ThunderBolt is a more efficient protocol without some of the extra CPU utilization and overhead of negotiating a data transfer that the USB Universal Serial Bus device specification involves.

When a typical single 6GBps SATA III solid-state drive is connected to a ThunderBolt or USB 3.1 Gen 2port they tend to utilize only about half of the available bandwith on either computer interface. Much of this is simply because most data transfers in every-day real-world use sparse, spotty and intermittent Read / Write requests. Most data requests are NOT SUSTAINED, BANDWITH INTENSIVE processes much of the time.



Tags: ThunderBolt Flash Drives, ThunderBolt Thumb Drive, Intel Flash Drive, ThunderBolt 3 Flash Drive, ThunderBolt 3 Keychain Drive, Type-C Flash Drive