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Compact black USB 3.0 SD and microSD card reader

IOGEAR

IOGEAR GFR304SD USB 3.0 card reader

SKU CH-BMDE-YM0VW MPN GFR304SD

Reads SD, SDXC, MicroSD and MMC cards over USB 3.0 at up to 5 Gbps in a compact, bus-powered design

  • Interface typeUSB 3.0
  • Installation typeExternal
  • Support - MMCRequires Card
  • Product typeFlash Reader
  • Product colorBlack
  • Compatible withSupporting Media List: SD/SDHC: SD, SDHC, SDXC, MicroSDXC, S
  • USB 3.0 interface delivers up to 5Gbps transfer speed
  • Reads SD, SDHC, SDXC, MicroSD and MMC cards
  • Compact 2.5" x .8" x .4" form factor fits any bag
  • Bus-powered operation removes the need for an AC adapter
  • External USB 3.0 connection installs without opening the PC

USB 3.0 SD and MicroSD reader

The IOGEAR GFR304SD is an external USB 3.0 card reader that handles SD, SDHC, SDXC, MicroSD and MMC media. It connects through a standard USB 3.0 port and draws power from the bus, so no separate adapter is needed. Its compact 2.5" x .8" x .4" black housing makes it easy to carry in a laptop bag or pocket.

Upgrading from USB 2.0 readers

Swapping an older USB 2.0 reader for this model raises the peak transfer rate to 5 Gbps, which shortens offload times for high-capacity SDXC and MicroSDXC cards. The jump is worth it when you regularly move multi-gigabyte photo or video batches and want the bus speed to keep pace with the card's own rating. It does not support CompactFlash or Memory Stick formats.

Check your ports and media

Verify that your computer has a free USB Type-A port for the 3.0 connection; the reader will fall back to USB 2.0 speeds on older ports. Confirm your cards are SD, SDHC, SDXC, MicroSD or MMC types, as other formats are not accepted. No driver installation is required on modern Windows or macOS systems.

How it compares

Measured against everything we stock in USB & Internal Card Readers, at today’s prices. Recalculated every night.

Price $23.99
Pricier than about 62% of the 511 comparable items (median $18.99).

Specifications

Product
Brand nameIOGEAR
Model nameGFR304SD
Product typeFlash Reader
Product colorBlack
Memory
Support - memory stickNo
Ports & slots
Interface typeUSB 3.0
Size & build
Product dimensions2.5 in × 0.8 in × 0.4 in
Shipping weight0.04 kg
Package size164 × 113 × 19 mm
Compatibility
Compatible withSupporting Media List:
SD/SDHC: SD, SDHC, SDXC, MicroSDXC, SD-Pro, SD-Pleomax, SD-Pro C, Ultra II SD, Ultra II Plus SD, SD-Extreme III, SD-Ultra X, SD-Turbo, SD-Supper, SD Max, Mini SD, Mini SD-Pro, Mini SD-Pleomax, MMC, MMC-Pleomax, MMC Pro, HS-MMC, MMC Plus, MMC-Plus Turbo, RS MMC, RS MMC-Pleomax, RS MMC-Speed, RS MMC-Max, MMC Mobile, MMC Mobile-ProC, MMC Mobile-Pocketnet, MMC Micro*
microSD / microSDHC: microSD / microSDHC, T-Flash
* Adapter required.
Support - compact flashNo
Support - MMCRequires Card
Support - SDYes
In the box
In the box1 x SuperSpeed USB 3.0 SD / MicroSD Card Reader / Writer
1 x Quick Start Guide
1 x Warranty Card
More details
Installation typeExternal

Questions about this item

How much desk space does the 2.5 by 0.8 by 0.4 inch GFR304SD reader occupy?

The reader measures 2.5 inches long, 0.8 inches wide and 0.4 inches thick, so it fits beside a laptop or behind a monitor without crowding other ports.

What is the common mistake when plugging the GFR304SD into a USB 3.0 port for the first time?

Users often insert the cable upside down or into a USB 2.0 port; align the blue-tabbed USB 3.0 plug with the matching blue port and push straight in until it clicks.

Which card-slot springs or contacts on the GFR304SD tend to wear out first and need replacement?

The SD and microSD slots share the same spring-loaded eject mechanism; if a card sticks, the whole reader is replaced because the mechanism is not user-serviceable.

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