UGREEN CM304 2-in-1 USB 3.0 & USB-C SD Card Reader

One Small Reader, Two Ports, Two Cards at Once

The UGREEN CM304 covers both sides of the USB divide with a built-in USB-A 3.0 connector and a USB-C tip, so it plugs straight into a laptop, desktop, or a USB-C phone or tablet without needing a separate adapter. A GL3224 controller chip drives transfers at up to 5Gbps, and the reader can access an SD card and a microSD card at the same time — handy for offloading a camera card and a phone's storage card in one session instead of swapping between them.

Card compatibility spans SDXC, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, and Micro SDHC, with support for cards up to 2TB. The compact housing includes protective plug covers for both connectors, keeping the ports clean and the reader tidy enough to toss in a camera bag or laptop sleeve without a case.

It's fully plug-and-play, with no drivers needed on Windows, macOS, iPadOS, or Android — just plug in whichever end matches your device and start transferring.

• Dual Connector Design: Built-in USB-A 3.0 and USB-C ends cover both computers and USB-C mobile devices.
• Simultaneous Dual-Card Access: Read an SD and microSD card at the same time.
• 5Gbps Transfers: GL3224 chip delivers fast, reliable file transfer speeds.
• Broad Card Support: SDXC, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC, up to 2TB.
• Protective Plug Covers: Keeps both connectors clean and dust-free between uses.
• True Plug-and-Play: No drivers required on Windows, macOS, iPadOS, or Android.

Specifications

• Model: UGREEN CM304 (80191)
• Connectors: USB-A 3.0 + USB-C (built-in, dual-ended)
• Card slots: SD + MicroSD (2-in-1, simultaneous access)
• Controller: GL3224 chip
• Transfer speed: Up to 5Gbps
• Card compatibility: SDXC, SDHC, SD, MMC, RS-MMC, Micro SDXC, Micro SD, Micro SDHC
• Max card capacity: Up to 2TB
• Design: Compact body with protective plug covers
• Compatibility: Windows, macOS, iPadOS, Android (driver-free)