For many home security cameras, you’ll want a microSD card (not a full-size SD). Look for:

• Endurance rating: Cards designed for continuous recording handle frequent overwrites better.
• Speed class: Class 10/U1 is a common baseline for Full HD; U3/V30 can help if your camera records higher bitrates or short 4K clips.
• Capacity: Typical support ranges from 32GB to 256GB, but it’s best to confirm the maximum in your manual.
• Formatting: Format the card in the camera so it applies the correct file system.

If the camera is outdoors or in warm spots, endurance models may offer more reliability. Review recordings periodically and replace heavily used cards over time. You’ll find microSD options with these specs on this page.

If your doorbell or camera supports local storage, choose a microSD that’s built for frequent writes. Key tips:

• Endurance design: Made for 24/7 or motion-triggered video loops.
• Speed: Class 10/U1 works for many setups; U3/V30 provides headroom for higher bitrates.
• Capacity: 64–128GB is a practical balance for many users, though some devices accept 256GB or more—check your manual.
• Setup: Format in-device, enable loop recording, and keep firmware updated.

How long video is stored depends on resolution, bitrate, and motion activity. In warmer installations, endurance-rated cards may help with longevity. You can filter for microSD endurance cards on this page to narrow options.

It depends on the device type—handheld navigator, action device, or dash cam:

• Dash/helmet cams: microSD with an endurance rating and U3/V30 for 1080p–4K. Common capacities run 32GB–256GB.
• Handheld GPS units: microSD for maps/music often works well with U1/U3; capacity support varies by model.
• Action/360 devices: U3/V30 (or higher) helps handle high-bitrate video.

Check your device manual for maximum capacity and the required file system (FAT32 or exFAT). Formatting in the device can improve compatibility. For windshield-mounted units, heat tolerance matters. This page includes microSD options across endurance, speed, and capacity to suit different needs.

For a modern mirrorless that captures high-resolution stills and 4K video, consider a full‑size SD card with:

• Type: SDXC (64GB+) to handle longer clips and burst shooting.
• Speed: UHS‑I with U3/V30 works for many 4K modes; UHS‑II with V60 or V90 can help with higher bitrates and faster bursts.
• Reliability: Use a full-size card rather than a microSD in an adapter for demanding shooting.
• Workflow: Format in‑camera and rotate multiple cards for backups.

Match the speed class to your typical frame rates and codecs. You can filter by SDXC capacity and V‑class ratings on this page to find a good fit.

Speed classes indicate minimum write performance, which affects video recording and photo bursts:

• Class 10: Legacy rating suited to basic Full HD.
• U1/U3: U1 supports many 1080p uses; U3 targets higher bitrates and 4K.
• V30/V60/V90: Video ratings—V30 for most 4K; V60/V90 for high-bitrate or slow‑motion.
• A1/A2: App performance ratings for phones/tablets.

Capacity types matter too: SDHC (up to 32GB) and SDXC (64GB+). Choose a class your device calls for; higher ratings can help but only if your device supports them. This page features cards across these classes, making it easier to match speed and capacity to your setup.