Can I use consumer memory cards in surveillance cameras?
Consumer cards lack endurance ratings and thermal stability for 24/7 recording. They typically fail within weeks in continuous-write environments, causing unplanned downtime and lost footage. Always specify surveillance-class cards with documented V-Class and TBW ratings matching your deployment profile.
How do I calculate the right card capacity for my camera?
Multiply your camera's bitrate (Mbps) by the desired retention hours and divide by 8 to get megabytes. For example: a 4 Mbps 1080p stream × 24 hours ÷ 8 = 12 GB per day. Add overhead for metadata and file system (10–15%), then round up. Use retention math guidance to avoid undersizing.
Should I choose SD or microSD cards for edge recording?
SD cards fit larger devices (traditional NVRs, tower cameras) and offer higher capacities; microSD cards fit compact IP cameras, PTZ units, and mobile devices. Performance (V-Class, endurance) matters more than size—verify your device's physical and electrical card slot specifications before purchasing.
What's the difference between V30 and V60 speed classes?
V30 guarantees 30 MB/s sustained writes; V60 guarantees 60 MB/s. V30 suffices for single-stream 1080p and 2 MP recording; V60 is required for 4K, high-bitrate codecs, or multi-stream simultaneous capture. Check your camera's maximum write demand in the datasheet to avoid bottlenecked performance.
Can I hot-swap memory cards without shutting down the camera?
Most modern cameras support safe ejection through firmware menu or API, but some require graceful shutdown or recording pause. Always consult your device's manual; unsafe removal risks file system corruption and loss of active footage. Plan maintenance windows or use redundant dual-card slots to avoid downtime.
How often should I replace surveillance-rated memory cards?
Replace cards when they approach 80% of rated endurance hours or show SMART warnings (if supported). For 24/7 continuous recording, plan replacement every 1–2 years depending on actual bitrate and TBW rating. Implement quarterly backups of edge recordings to offline archival and rotate spares into service proactively.