SanDisk Ultra 64GB microSDXC UHS-I Card

SanDisk Ultra 64GB microSDXC UHS-I Card (often listed with speeds up to 100MB/s read) is a reliable, budget-friendly expandable storage option from SanDisk’s popular Ultra lineup. It’s widely used for smartphones, tablets, action cameras, drones, Nintendo Switch, Chromebooks, and other devices needing extra space for photos, videos, apps, and files.

Key Specifications

• Capacity: 64GB (plenty for thousands of photos, hours of Full HD video, or large app libraries)
• Speed Class Ratings:
  • UHS-I (U1)
  • Class 10
  • A1 (Application Performance Class 1) — optimized for faster app loading and performance on Android devices
• Read Speed: Up to 100MB/s (some newer or variant listings claim up to 150MB/s with compatible readers; real-world results often hit 90-100MB/s depending on the device and conditions)
• Write Speed: Typically lower (around 10-50MB/s in tests; minimum guaranteed 10MB/s for Class 10)
• Video Support: Full HD (1080p) recording; not ideal for high-bitrate 4K in demanding scenarios (better options like SanDisk Extreme with V30 exist for that)
• Includes: Full-size SD adapter for use in cameras, laptops, or other SD slots
• Durability: Shockproof, temperature-proof, water-proof, and X-ray-proof (standard SanDisk Ultra build)
• Warranty: Usually 7-10 years limited (varies by region and exact model variant)
• Common Model Numbers: SDSQUNR-64G, SDSQUAR-64G, SDSQUAC-64G (slight variations in packaging/speed claims)

Performance Notes

This is an entry-to-mid-level card — great for everyday use like storing media, casual gaming (e.g., Switch), or expanding phone storage. App performance benefits from the A1 rating (faster launches than non-A1 cards). However, write speeds aren’t the fastest, so for intensive tasks like 4K video recording or heavy random writes (e.g., running demanding games from the card), consider upgrading to an A2/V30 card like SanDisk Extreme.