6-Slot Thunderbolt 3 SD Card Reader - Portable

Multi-Card Reader | SD™, SDHC™, SDXC™ | TAA Compliant | SD 4.0, UHS-II

Product ID: 6SD4FCRTB3C

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  • Edit your photos and videos anywhere you go using this portable SD card reader
  • Access up to 6 SD cards at the same time with this multi-card reader
  • Power the SD card reader through the Thunderbolt 3 port on your device
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This Thunderbolt 3 SD card reader and writer lets you access up to six SD cards at the same time from your laptop. It’s perfect for when you are working offsite on assignment.

The reader is also ideal for creative professionals such as photographers and videographers who work with 4K and 3D content.

Portable Design

Access your photos and videos anywhere you go. The portable SD card reader has a sleek, compact design for maximum convenience. The integrated Thunderbolt 3 cable lets you quickly access your data without having to stop and find a cable.

Plus, the reader is powered through the Thunderbolt 3 port on your laptop. There’s no need to carry a separate power adapter.

Multi-Card Reader Supports All SD Card Types

The 6-slot Thunderbolt 3 card reader supports all SD cards: SD (Secure Digital), SDHC (Secure Digital High Capacity) and SDXC (Secure Digital Extended Capacity). Each slot is UHS-II enabled so that you can access data at up to UHS-II speeds.

The reader also supports Micro SD cards when connected through an adapter.

Thunderbolt 3 Support

The reader transfers files between a Thunderbolt 3 computer or tablet and SD cards. You can connect it at the end of a daisy chain and expect all of the security and benefits that you would from any Thunderbolt 3 product.

6SD4FCRTB3C is TAA compliant and comes with a StarTech.com 2-year warranty and free lifetime technical support.


  • Access multimedia content quickly, anywhere you go
  • Ideal for creative professionals on assignment
  • Creative professionals working with 4K and 3D content

Partner Numbers

  • Tech Data 13560594
  • A.B. Distributing, Inc. STAR-6SD4FCRTB3C
  • ASI 226040
  • UPC 065030874557


  • OS Independent logo
OS independent; No software or drivers required


Warranty Information Warranty 2 Years
Form Factor Compact
6 - External Ports SD / MMC Slot
Connector(s) 6 - Drive Connectors SD / MMC Slot
1 - Host Connectors Thunderbolt™ 3 USB-C (24-pin) (40Gbps)
Environmental Operating Temperature 0°C to 60°C (32°F to 140°F)
Storage Temperature -20°C to 60°C (-4°F to 140°F)
Humidity 0~90% RH
Hardware Interface Thunderbolt 3
Bus Type Thunderbolt 3
Chipset ID Intel - JHL6240
Texas Instruments - TPS65983
Genesys Logic - GL3226
ASMedia - ASM1061
Indicators 6 - LED Indicators Activity
Packaging Information Shipping (Package) Weight 0.6 lb [0.3 kg]
Package Length 8.3 in [21.0 cm]
Package Width 5.7 in [14.5 cm]
Package Height 1.6 in [40.0 mm]
Performance Maximum Data Transfer Rate 5Gbps
Type and Rate Thunderbolt 3 - 40 Gbit/s
UHS-II (SD 4.0; 312MB/s)
Memory Media Type SDXC (Secure Digital eXtended Capacity)
SDHC (Secure Digital High Capacity)
SD/MMC (Secure Digital/Multimedia Card)
Physical Characteristics Color Silver & Black
Material Plastic
Cable Length 8.7 in [220 mm]
Product Length 5.3 in [13.5 cm]
Product Width 3.2 in [82.0 mm]
Product Height 0.7 in [19.0 mm]
Weight of Product 5.3 oz [151.0 g]
Power Power Source Bus Powered
Software OS Compatibility OS independent; No software or drivers required
Special Notes / Requirements Note Use the Thunderbolt 3 port on your host computer with the highest power output for the best performance. To ensure proper operations of this device a Thunderbolt 3 15W port is required. Consult the manufacturer of your host computer for details regarding the power specifications of your Thunderbolt 3 ports.
What's in the Box 1 - Included in Package SD Card Reader
Quick-Start Guide


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Frequently Asked Questions

Before You Buy

Thunderbolt 3 uses the USB-C connector, but not all host connections, cables, and devices with a USB-C connector support Thunderbolt 3. This means that a USB-C device is compatible with a Thunderbolt 3 host connection, but a Thunderbolt 3 device is not compatible with a USB-C host connection. Therefore, it is essential to know whether you have a USB-C or a Thunderbolt 3 host, cable, or device.  

To determine if your component is a Thunderbolt 3 device, look for the Thunderbolt 3 symbol. USB-C devices do not include this symbol.  For more information about USB-C, see the following FAQ: http://www.startech.com/faq/usb-c-port-capabilites

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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