ProGrade Digital SDXC UHS-II V90 300R Memory Card 64GB - Fast 4K Video

In this review of the ProGrade Digital SDXC UHS-II V90 300R 64GB memory card, the bottom line is simple: this card is built for photographers and videographers who need consistent, high sustained write performance for 4K and RAW workflows. The reviewer found the card delivers the class-leading read and write speeds claimed, clears camera buffers quickly, and integrates with professional cameras from Canon, Sony, Nikon and others. For anyone shooting high-bitrate video or continuous RAW stills, the card's reliability and testing pedigree are the single biggest reasons to choose it.

Key Features

• 300 MB/s read: Fast transfer speeds make offloading large files and backing up footage noticeably quicker than UHS-I cards.
• Up to 250 MB/s write: Sustained write rates support 4K, 8K and RAW recording without dropped frames in many professional cameras.
• UHS-II, V90, U3: Video speed class and UHS-II interface ensure consistent performance for high-bitrate codecs.
• Rigorous 100% testing: Serialized tracking and complete card testing aim to reduce failures and improve quality control for critical shoots.
• Three year warranty: Manufacturer support and warranty provide added confidence for pros investing in media.
• Refresh Pro software compatibility: Optional refresh and sanitize tools help maintain peak performance and monitor card health.

Who It's For

The ProGrade SDXC UHS-II V90 300R 64GB is best suited to professional photographers and videographers who record sustained high-bitrate video or large RAW files, including users of Sony A7 series, Canon and Nikon mirrorless cameras. It is designed for camera operators who need cards that clear buffers fast and minimize write-related interruptions during long bursts or continuous recording.

Casual shooters who only capture HD video or occasional photos will find this card more performance and cost than necessary and might prefer lower-cost UHS-I options. Users who require very large capacities for multi-day shoots should consider higher-capacity V90 cards in the same family.

Pros & Cons

Pros

• Excellent sustained write and read speeds for 4K/8K and RAW workflows.
• Thorough quality control with serialized tracking reduces risk of defective cards.
• Quick buffer clearing in camera improves shooting responsiveness.
• Three year warranty and available refresh software help protect investment.

Cons

• Higher price compared with basic SD cards, and some users report mixed long-term longevity experiences.

Specifications

Our Verdict

The ProGrade Digital SDXC UHS-II V90 300R 64GB is a sensible choice for professionals who need reliable, high sustained write speeds for 4K and RAW capture; its rigorous testing and warranty back the investment. While cost-conscious hobbyists may prefer cheaper cards, anyone shooting high-bitrate video or long RAW bursts will appreciate the consistent performance and buffer-clearing speed.

Frequently Asked Questions

Will this card work in my mirrorless camera?
Yes, it is compatible with major mirrorless and DSLR brands listed and performs well in cameras that support UHS-II.

Is the write speed reliable for continuous 4K recording?
Yes, the V90 rating and up to 250 MB/s write specification indicate it supports sustained high-bitrate 4K recording in supported cameras.

How can I keep the card performing well over time?
ProGrade offers Refresh Pro software (sold separately) to sanitize and refresh flash memory and tools to monitor card health before important shoots.