SD Card Price Comparison

Class 10: 10 MB/s minimum write, basic HD video. UHS-I: Up to 104 MB/s read, good for 4K video. UHS-II: Up to 312 MB/s, professional photography. V30: 30 MB/s sustained write, 4K video. V60: 60 MB/s, high-bitrate 4K. V90: 90 MB/s, 8K video/RAW burst. A1: 1500 IOPS, app performance. A2: 4000 IOPS, better app loading.

SD (32×24mm): Standard cameras, camcorders, some laptops. MicroSD (15×11mm): Smartphones, tablets, action cameras, drones, Nintendo Switch. MiniSD: Largely obsolete. CF (36×43mm): Professional DSLRs, older cameras. CFexpress Type A/B: Latest high-end cameras, extremely fast (up to 1700 MB/s). XQD: Professional cameras, being replaced by CFexpress.

Basic photography: Class 10, 32-128GB. 4K video: V30+ (UHS-I U3), 128GB+. Professional video: V60/V90, 256GB+. RAW burst photography: UHS-II, fast write speeds. Action cameras: U3 + waterproof ratings. Drone/GoPro: High endurance cards, extreme temperature ratings. Always check camera compatibility first.

Standard cards: Basic protection, consumer use. High endurance: Designed for security cameras, dashcams, continuous recording. Extreme/Pro cards: Waterproof, shockproof, X-ray proof, temperature resistant (-25°C to +85°C). Write cycles: 10,000+ for quality cards. Look for lifetime warranties and data recovery services from SanDisk, Lexar, Samsung.

Card not recognized: Clean contacts, try different device, check formatting (FAT32 <32GB, exFAT >32GB). Slow performance: Use faster card class, check USB reader speed, ensure proper formatting. Corrupted files: Avoid removing during write operations, use quality readers, run disk repair tools. Write protection: Check physical lock switch, use formatting tools.

Smartphone storage: 64-256GB microSD. Basic camera: 32-128GB SD. 4K video recording: 128GB+ (1 hour 4K ≈ 45GB). Professional photography: 256GB+ for RAW files. Security cameras: High endurance 128-512GB. Gaming (Switch): 128-512GB microSD. Action cameras: 64-256GB with high write speeds.