In player details>info you can review your SD’s card's health. The colors represent how worn out your SD card is. Please refer to the following table for more information on what each color represents.
The lower the number, the healthier the card is. A high number does not necessarily mean that the SD card is not working or damaged, but that it is getting closer to the end of its useful life span. BrightSign recommends replacing your Micro SD card when the % health reaches 90%.