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Black rectangular card reader with four slots and short USB cable

UGREEN 30333 USB 3.0 Multi-Card Reader 5Gbps 4 Slots Black

SKU CH-6X4W-PR8N0

Reads four SD, microSD, CompactFlash or Memory Stick cards at once over USB 3.0 at up to 5 Gbps

  • Connection typesUSB
  • Regulatory statusNot capable emitting RF energy
  • Product dimensions2 L × 10 W × 15 H centimeters
  • Product weight0.08 kg
  • USB 3.0 delivers up to 5Gbps transfer speed for fast file moves
  • Four slots read SD, Micro SD, CF and MS cards simultaneously
  • Plug-and-play on Windows, Mac, Linux and Chrome OS with no drivers needed
  • Compact 2.17×2.68×0.59 in design with 1.7 ft cable suits mobile workflows
  • Supports cards up to 2TB capacity for high-volume storage needs

All-in-One Card Reader

The UGREEN 30333 is a USB 3.0 multi-card reader that accepts SD, Micro SD, Compact Flash and Memory Stick formats in four dedicated slots. It connects via a standard USB-A interface and draws power directly from the host, requiring no external adapter. The compact housing measures 2.17 by 2.68 by 0.59 inches with a 1.7 ft cable, making it a practical accessory for photographers and videographers who need to offload media from multiple cards at a workstation or on location.

Suits multi-format workflows; not for CFexpress

This reader suits professionals who juggle SD, Micro SD, CF and MS cards daily and want to mount up to four cards simultaneously without swapping. It supports UHS-I speeds and capacities up to 2TB per card. It is not for users who need CFexpress Type A or Type B support, as the Compact Flash slot is limited to legacy CF cards. Buyers with only USB-C ports on their laptop will require a separate USB-C to USB-A adapter, which is not included.

5 Gbps peak; four-card concurrency

The USB 3.0 interface delivers a theoretical maximum of 5 Gbps, enabling rapid transfer of large RAW files and video clips when a single card is active. The hardware can read and write four cards at once, though the supplier notes that simultaneous multi-card operation may reduce per-card throughput. For maximum speed, the manufacturer recommends reading one card at a time connected to a standard USB-A 3.0 port.

How it compares

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

Price $14.99
Cheaper than about 82% of the 294 comparable items (median $21.99).

Specifications

Product
Brand nameUGREEN
Model name30333
Part number30333
Ports & slots
Connection typesUSB
Size & build
Product dimensions2 L × 10 W × 15 H centimeters
Product weight0.08 kg

Questions about this item

What computer port is required for the 30333 to reach its 5Gbps rate?

A standard USB-A 3.0 interface is needed; the included 1.7 ft cable ends in a USB-A plug.

Can I leave a CF card and a microSD card inserted together without slowing each other down?

The 30333 reads four cards simultaneously, but the supplier notes transfer speed may drop when multiple cards are active at once.

How do I verify the reader is operating at the advertised 5Gbps after plugging it in?

Connect to a USB-A 3.0 port, insert a single UHS-I card, and confirm the OS reports a SuperSpeed USB connection.

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