![[Older Version] SanDisk 256GB Ultra microSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-256G-GN6MA](https://m.media-amazon.com/images/I/61mDTjSOe8L._AC_SL1200_.jpg)
Evaluating Older Generation microSD Cards: What the SanDisk Ultra 256GB Offers
This specific SanDisk Ultra microSDXC card represents an older generation of flash storage, characterized by its UHS-I bus interface and A1 application performance rating. Buyers should understand that while its 100MB/s read speed and 256GB capacity are substantial, these specifications have been surpassed by newer UHS-II and A2-rated cards. The included adapter adds versatility for use in standard SD card slots.
Key Considerations Before Buying
- The UHS-I interface limits maximum theoretical speeds to 104MB/s, making this card less suitable for 4K video recording or high-speed burst photography compared to newer UHS-II cards.
- The A1 (Application Performance Class 1) rating indicates it meets minimum random read/write speeds for running apps on Android devices, but newer A2-rated cards offer significantly better app performance.
- As an 'Older Version,' this model may represent previous flash memory technology, potentially affecting longevity and sustained write speeds under continuous use.
What Our Analysts Recommend
For this specific product, verify the exact model number (SDSQUAR-256G-GN6MA) matches listings, as SanDisk frequently updates internal components without changing external branding. Check reviews mentioning sustained performance in devices like Raspberry Pi or dash cams, as these reveal real-world write speed consistency beyond advertised peak rates.
Micro SD Cards Market Context
Market Overview
The microSD market has rapidly evolved, with UHS-I cards like this SanDisk Ultra now occupying the value segment, while UHS-II and SD Express cards dominate the premium tier for professional use. Capacity has become less of a differentiator, with 256GB now considered mid-range as 1TB cards become affordable.
Common Issues
Older UHS-I cards often struggle with sustained write speeds during continuous recording, causing dropped frames in security cameras or action cams. Counterfeit cards with spoofed capacity remain prevalent, particularly for well-known brands like SanDisk sold through unauthorized channels.
Quality Indicators
Genuine SanDisk cards feature precise laser etching on the front, a specific shade of red and gray on the label, and holographic elements on packaging. Performance validation through tools like H2testw provides the only reliable capacity verification, as fake cards often report incorrect storage amounts.
Review Authenticity Insights
Grade C Interpretation
A Grade C authenticity rating with 28% estimated fake reviews indicates significant review manipulation concerns for this specific listing. The unusually high 100% verified purchase rate contradicts normal review patterns where some percentage of users typically don't verify.
Trust Recommendation
Given the authenticity concerns, prioritize reviews that mention specific technical details like actual CrystalDiskMark results, compatibility issues with particular Raspberry Pi models, or longevity reports from security camera users. Be particularly skeptical of reviews lacking device-specific context.
Tips for Reading Reviews
Focus on reviews discussing sustained write performance over time, as this reveals card degradation. Look for mentions of the exact adapter included, as counterfeiters often substitute generic adapters. Reviews noting the 'Made in China' vs. 'Made in Taiwan' origin can indicate production batch variations.
Expert Perspective
This SanDisk Ultra 256GB card presents a mixed value proposition. Its 4.87/5 Amazon rating appears inflated when adjusted to 4.20/5 after authenticity analysis, suggesting more realistic performance expectations. The UHS-I interface and A1 rating make it adequate for basic smartphone expansion, Nintendo Switch storage, or 1080p recording, but insufficient for demanding applications. The substantial review volume (645,642 reviews) indicates widespread adoption, though authenticity concerns warrant cautious evaluation.
Purchase Considerations
Weigh the potential cost savings against newer A2-rated alternatives that offer better random access performance for applications. Consider whether your primary use involves continuous writing (like dash cams) where sustained speed matters more than peak read performance. Verify the seller's authorization status, as SanDisk's warranty typically requires purchase from authorized retailers.
Comparing Alternatives
Shoppers should compare sustained write speeds and warranty terms with current SanDisk Extreme models or competitors like Samsung EVO Select, which often offer similar pricing with updated specifications.
