What is a TF card with C4?

A TF card, also known as a microSD card, is a small storage device used in various electronic devices like smartphones, tablets, and cameras. The "C4" designation refers to the card's speed class, specifically Class 4, which indicates a minimum write speed of 4 MB/s. This speed is suitable for basic tasks such as storing photos and videos, but may not be optimal for high-definition video recording or intensive applications. For better performance, higher class ratings like Class 10 or UHS (Ultra High Speed) are often recommended.