Applies to: All Zosi cameras supporting SD card.
Security cameras may record 24/7 whatever the weather condition, and they need a card able to record without error with sustained performances and a limited risk of failure. It is key to select the correct SD card.
| Class Speed | UHS Speed | Application | Write Speed |
| C2 | SD (Standard resolution) | 2 MB/s | |
| C4 | 720p/1080p | 4 MB/s | |
| C6 | 720p/1080p | 6 MB/s | |
| C10 | U1 | 720p/1080p,4K | 10 MB/s |
| U3 | 720p/1080p,4K @60/120fps | 30 MB/s | |
| 720p/1080p,4K ,8K @60/120fps | 60 MB/s | ||
| 720p/1080p,4K ,8K @60/120fps | 90 MB/s |
For security cameras, you can buy at least a C10 or U1 micro SD card which can record Full HD video (1920*1080) at 30 FPS without any issue.
Please use the following chart to get the right Micro SD card for Zosi cameras.
| Item | Requirement |
| Capacity | 8GB or 16GB or 32 GB is suggested (Up to 256GB for specific models) |
| Read and Write Speed | Class 10 or higher/ ≥26Mbps |
| Format | FAT32 |
The Micro SD cards for security cameras must be reliable and be able to write and read at high-speed. Be aware of those factors before buying yours.
The brand is also very important because the quality is directly related to the manufacturer so it's better to choose the well-known ones.
Here is my recommendation for the best cards you can use for your cameras.
Please let us know if you have any questions.