First, please check your SD card error message (it varies slightly among different models). Generally, these error messages can be classified into the following types:

**1. "SD/TF card error / Please replace the SD card"**
If your action camera displays a "Card Error" message and you are unable to format it, the following troubleshooting steps can be attempted:

1.1 Check the SD card: Ensure that the SD card is correctly inserted into the camera. Sometimes, a loose or improper insertion can lead to such an error. Also, check for any physical damage to the card. SD cards can get damaged due to rough handling, exposure to extreme temperatures, or electrical surges. If the card is damaged, it may be necessary to replace it as a damaged card may have corrupted sectors or a malfunctioning controller, which can prevent the camera from reading or writing to it properly.

1.2 Format the SD card on a computer: If the camera fails to format the SD card, try formatting it on a computer. Insert the SD card into a card reader and connect it to the computer. Right - click on the SD card and select "Format." When choosing the file system, FAT32 is a commonly used option for SD cards in motion cameras as it is widely supported. However, for larger capacity SD cards (over 32GB), exFAT may be a better choice. After formatting, re - insert the card into the camera and check if the issue is resolved. Formatting on a computer can sometimes fix issues related to file system corruption or incorrect formatting settings on the card.

1.3 Try a different SD card: If the above methods do not work, try using a different SD card. There could be an inherent problem with the original SD card, such as a manufacturing defect or wear - and - tear. By using a different card, we can determine whether the issue is specific to the card or related to the camera itself.

**2. "No SD card recognised"**

2.1 Please check if the SD card is inserted normally: Ensure that the SD card is fully inserted into the camera's card slot. A partial insertion can prevent the camera from detecting the card. Also, check if there is any debris or dirt in the card slot that might be interfering with the connection.

2.2 Please try a different SD card to identify whether the problem lies in the camera's card slot or the previous SD card: If the camera still does not recognize the new SD card, there may be an issue with the card slot, such as a loose connection or a malfunctioning contact. If the new SD card is recognized, then the problem was with the original SD card.

**3. "Please format SD/TF card"**

3.1 Please format the SD card through the camera several times and try again: Sometimes, the SD card may have minor formatting issues that can be resolved by re - formatting it within the camera. However, if the problem persists after multiple attempts, it may indicate a more serious problem with the card or the camera's formatting function.

3.2 Please use a computer to format the SD card if the initialisation of the camera is still invalid: Formatting on a computer provides an alternative method to correct any formatting problems. As mentioned before, when formatting on a computer, choose the appropriate file system based on the size of the SD card.

3.3 If the above is not effective, please replace the SD card and try again: If neither formatting within the camera nor on a computer solves the problem, it is likely that the SD card has a more severe defect, and replacement may be the only solution.

**4. "SD card speed slow"**
If your camera displays this error, please replace your SD card with a U3, class10 grade SD card. In a motion camera, a slow - speed SD card can cause issues such as dropped frames during video recording or slow write times when taking photos in rapid succession. U3 and class10 grade SD cards are designed to handle high - speed data transfer, which is essential for the proper functioning of a motion camera, especially when recording high - definition videos or burst - mode photography.