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Black compact card reader with USB-C and USB-A connectors, two card slots and protective end caps

STARTECH

STARTECH SDMSDRWU3AC USB-C & USB-A card reader 5 Gbps

SKU CH-EG27-ZJDHW MPN SDMSDRWU3AC

Compact dual-slot reader transfers SD and microSD files via USB-C or USB-A at 5 Gbps

  • Slots2
  • Installation TypeExternal
  • ColorBlack
  • Interface1 x USB Type-C (24 pin) USB 3.0, 1 x USB 3.1 USB Type-A (9 p
  • CompatibilitySD/MMC (Secure Digital/Multimedia Card), SDHC (Secure Digita
  • Support - MMCYes
  • Read SD and microSD cards on USB-C or USB-A devices
  • 5 Gbps USB 3.0 speeds for fast file transfers
  • Thunderbolt 3 port compatible for modern laptops
  • Compact 0.40" x 0.80" x 3.10" design fits any bag
  • No driver installation needed for instant use

USB-C and USB-A card reader for SD and microSD

This external reader connects to USB-C or USB-A ports on laptops, tablets, smartphones and desktops. It accepts full-size SD and microSD cards including SDHC, SDXC and MMC formats. The compact black housing measures .40" x .80" x 3.10" and requires no driver installation.

Dual USB 3.0 interface at 5 Gbps

The device provides one USB Type-C connector with 24 pins and one USB 3.1 Type-A connector operating at Gen 1 speed. Both interfaces support data transfer rates up to 5 Gbps and are backward compatible with USB 2.0 hosts. Thunderbolt 3 ports also accept the USB-C plug.

Sustained transfers limited by card speed

Under continuous load the reader delivers whatever throughput the inserted SD or microSD card can sustain. The USB 3.0 link does not bottleneck typical UHS-I media, but UHS-II or faster cards will not reach their peak rates through this 5 Gbps interface. Heat buildup is negligible in the small enclosure.

Highlights

  • Read SD and microSD cards on USB-C or USB-A devices
  • 5 Gbps USB 3.0 speeds for fast file transfers
  • Thunderbolt 3 port compatible for modern laptops
  • Compact 0.40" x 0.80" x 3.10" design fits any bag
  • No driver installation needed for instant use

Specifications

BrandStarTech.com
ModelSDMSDRWU3AC
Slots2
Installation TypeExternal
ColorBlack
Interface1 x USB Type-C (24 pin) USB 3.0, 1 x USB 3.1 USB Type-A (9 pin, Gen 1, 5 Gbps)
CompatibilitySD/MMC (Secure Digital/Multimedia Card), SDHC (Secure Digital High Capacity), SDXC (Secure Digital eXtended Capacity), Micro-SD (Micro Secure Digital), Micro-SDHC (Micro Secure Digital High Capacity), Micro-SDXC (Secure Digital eXtended Capacity)
Support - MMCYes
Support - SDYes
Dimensions0.40" x 0.80" x 3.10"
FeaturesTransfer photos, videos, music and other files between your SD or microSD card and your USB-C or USB-A enabled tablet, laptop, smartphone or desktop computer
Supports a wide range of SD cards (including SDHC and SDXC) and microSD cards (including SDHC and SDXC)
Supports USB 3.0 with data transfer speeds up to 5 Gbps (USB powered)
Thunderbolt 3 USB-C port compatible
Compact, portable design
Backward compatible with USB 2.0
No driver or software installation required
Package Contents1 x card reader / writer
2 x end caps
1 x quick-start guide
Shipping weight0.03 kg
Package size100 × 70 × 20 mm

Questions about this item

What does the 5 Gbps figure mean when I am copying files from an SD card?

It is the USB 3.1 Gen 1 interface ceiling; real-world throughput will be lower and depends on the card's own read speed.

Which USB standard does the Type-C port use and what does that limit?

The Type-C port runs USB 3.0, so the 5 Gbps link caps total bandwidth for both slots combined.

How much space does the reader need to sit beside a laptop port?

The body measures 0.40" x 0.80" x 3.10", so it fits alongside most adjacent ports without blocking them.

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