This article covers ProGrade Digital(プログレードデジタル) デュアルスロット SD UHS-II カードリーダー USB 3.1 Gen 2.

Overview

The ProGrade Digital Dual-Slot SD UHS-II Card Reader is a professional-grade device that leverages USB 3.1 Gen 2 to deliver transfer speeds up to 1250 MB/s. With two independent slots that can run at full speed simultaneously, it dramatically cuts down the time needed to offload large RAW photo libraries or 4K video footage. Its compact design includes an adhesive magnetic plate that attaches to a laptop, turning your setup into a portable workstation—ideal for photographers and videographers working in the field.

Connectivity & Compatibility

This reader uses a USB-C connector with USB 3.1 Gen 2 (10 Gbps) interface, fully supporting SD UHS-II cards while remaining backward compatible with UHS-I and standard SD, SDHC, and SDXC media. It works plug-and-play on Windows, macOS, and Linux without any driver installation. The included USB-C cable provides a reliable connection, and the magnetic plate lets you stick the reader to the back of your laptop lid for a clean, cable-managed setup.

Product Info

Released around 2018, the ProGrade Dual-Slot SD Reader sits firmly in the high-end tier of card readers. Its 1250 MB/s transfer rate is roughly 2.5× faster than typical USB 3.0 readers, making it a serious tool for professionals who value every second. The price hovers around ¥14,000, which is higher than consumer models but justified by the build quality and speed. The package includes the reader, a USB-C cable, an adhesive magnetic plate, and a quick-start guide. Warranty is 2 years from the manufacturer.

Best Use Cases

Professional photographers: Wedding and sports shooters who need to ingest hundreds of RAW files quickly will appreciate the dual-slot simultaneous transfer—no waiting for one card to finish before starting the next. Video editors: When working with 4K/6K high-bitrate footage, the bottleneck is often the card reader. This model keeps up with the fastest UHS-II cards, ensuring smooth data offloads. Mobile creatives: The magnetic plate lets you attach the reader to a laptop, making it perfect for editing on the go in coffee shops or on location. No more hunting for a lost reader in your bag. Not for casual users: If you only shoot JPEGs or occasionally transfer a few files, a cheaper USB 3.0 reader will serve you just fine—this is overkill for light use.

Product Disclosure (Amazon)

  • Manufacturer: ProGrade Digital
  • Seller: Amazon US
  • Fulfilled by: Amazon US
  • ASIN: B07M68C7V5
  • Note: This article covers a manufacturer-made product based on Amazon listing details.