Choose capacity based on how long you want footage to be stored and the camera’s video quality. Larger cards reduce the need to swap or offload files frequently, making continuous recording more practical. If you expect many hours of footage or high-resolution streams, opt for higher capacity while keeping a sensible price point.

Look for cards rated for sustained performance with reliable write speeds that support smooth video recording. Higher-speed cards minimize frame drops and buffering, especially for 4K or high-bit-rate streams. Check the camera’s recommendations for the minimum speed class and choose a card that comfortably exceeds that threshold.

Use the card type specified by your camera—SD cards for full-size slots and microSDs with adapters for devices that require smaller formats. Confirm compatibility with your device’s slot size, and consider a card with built-in adapter support if you switch between devices. This avoids buying incompatible storage hardware.

Format the card in the camera’s menu when possible to ensure proper partitioning, then periodically reformat to manage wear. Eject safely, keep the card away from extreme temperatures, and avoid filling it to capacity to reduce write failures. Regular backups prevent data loss if the card fails.

Most SD cards are cross-compatible across brands, but some devices require specific speed or capacity limits. Check your camera’s manual or official support resources to confirm the exact compatibility requirements before purchase. Using a trusted, widely compatible card reduces the risk of file corruption or read errors.

If footage becomes corrupted, frames freeze, or the camera cannot save new recordings, the card may be failing or full. Physical damage, frequent write errors, or unusual noise during reading can also indicate problems. In such cases, replace the card and restore from backups to prevent data loss.