Introduction

The SanDisk Extreme PRO SDXC UHS-II memory card (model number SDSDXDK-128G-GN4IN) promises blistering read speeds of up to 300MB/s. As a tech enthusiast who regularly shoots high-resolution photos and 4K video, I was eager to put this 128GB card through its paces. This review details my experience using the SanDisk Extreme PRO over several weeks of intensive testing.

Key Features

Beyond the advertised speed, this card offers several features designed for professional users. It’s UHS-II compliant, ensuring compatibility with high-end cameras and camcorders that support this faster standard. The Class 10, U3, and V90 speed ratings guarantee seamless performance even when recording high-bitrate video. The robust build quality, intended to withstand various conditions, is also a significant advantage.

Performance & Testing

I tested the SanDisk Extreme PRO using a professional DSLR and a high-end video camera. Writing speeds were consistently impressive, slightly below the advertised 300MB/s but still exceptionally fast compared to other cards in its class. I recorded several hours of 4K video with virtually no lag or dropped frames. File transfer to my computer was quick and efficient, noticeably faster than my previous UHS-I card.

During real-world usage, I experienced no data corruption or errors. The card performed flawlessly under pressure, which was crucial for my fast-paced workflows. I also intentionally stressed the card with heavy write and read cycles and it performed consistently well, showing exceptional durability.

Pros & Cons

Pros:

• Blazing-fast read and write speeds
• Excellent performance in high-bitrate video recording
• Robust build quality and reliability
• UHS-II compatibility
• Seamless integration with professional cameras

Cons:

• Slightly higher price point compared to UHS-I cards
• Write speeds were slightly lower than the advertised maximum, but still impressive.

Final Verdict

The SanDisk Extreme PRO SDSDXDK-128G-GN4IN 128GB SDXC card delivers on its promises. Its incredible speed, reliability, and robust build quality make it an excellent choice for professional photographers and videographers. While it’s on the higher end of the price spectrum, the performance benefits justify the investment. I highly recommend this card to anyone needing a fast and dependable memory solution.