Any SD cards above 2G are called SDHC (High Capacity) card. Some old computers cannot read SDHC card directly.
Make sure that you have pressed ok to save the changes that you make during the menu setup of the camera. If you forget to press ok to save these settings the camera will revert back to the default settings.
Normally you may have more than one camera deployed in different places in the field.
After you exchanged the SD cards and later on checked them on your computer you may have forgotten where those pictures were taken.
The Serial No. parameter setting takes care of this issue. You can use the combination of 4 digits and or letters to code the location and record it in the photos (e.g. YSP1 stands for Yellow Stone Park site one). This will help you to identify the location when reviewing the photos off-site.
The default setting is on. The two side prep PIR sensors provide wider sensing angle and detect more potential triggers. In some situations, you only want to monitor a narrow spot. Too many irrelevant triggers by the side sensors outside of that spot will keep the camera on and off. This wastes the battery power unnecessarily. In some other situations you may have difficulty removing the interfering tree branches, or avoiding the sunlight. If so, you have the option to turn off the side sensors.
This is not always necessary. The High setting suits indoors and environments with little interference, while the Normal/Low suits outdoors and environments with more interference. Temperature also affects the sensitivity. The High setting is suitable when the ambient temperature is warm, and the Low setting is helpful in cold weather.
For some expedient uses, you may only need 4 batteries without the additional battery box. To take full advantage of this camera and achieve longer field-life, we highly recommend you to always install the additional battery box.
When the red LEDs light up in the dark to work, they need to consume plenty of currency. If the battery power is low, the motion indicator will flash blue, and the camera will not take pictures or videos. This is crucial when the camera is set in video or cam+video mode where the LED lights have to stay on for the camera to take video clips.

Tips: Always use NEW high-performance alkaline or lithium batteries. For best performance, we would recommend Energizer Lithium batteries or other
High-quality brands. And if you prefer video mode, always install the factory-provided additional battery box. The video mode needs 8 x AA batteries to function properly.
When the motion indicator flashes blue or the battery icon on the LCD display shows low capacity please change batteries immediately.

Camera is triggered by the sudden change of ambient temperature. When placed in an environment where there is motion associated with tree limbs adjacent to the sensors or where there is high heat source in front of the camera, the camera can be “falsely” triggered constantly even if no subjects appear.
Setting a camera up above water also can cause false trigger because the reflection of the heat from the surface will subtly change the surrounding temperature.

Tips: Try not to place the camera close to tree limbs, or remove the limbs, twigs, and leaves from the outreach of the sensors. If in rare situation you cannot avoid the limbs, you can turn off the side Prep Sensors by setting it off in the menu. By doing this you may lose some sensing angles.

Also, try not to aim the camera at the sun or place it in an area with high heat source nearby. Try not to place the camera above water or other reflective objects such as mirrors or glasses.