What is the difference between SD and microSD cards?

The primary difference between SD and microSD cards lies in their physical size and intended use, although they also differ slightly in capacity and transfer speeds. Standard Secure Digital (SD) cards are larger, measuring about 32 millimeters by 24 millimeters. They are commonly used in devices such as cameras, camcorders, and some laptops, making them a popular choice for storing photos, videos, and larger files. SD cards are available in various storage capacities, ranging from a few megabytes to several terabytes, with different speed classes to accommodate high-definition video recording and fast data transfer. On the other hand, microSD cards are significantly smaller, measuring around 15 millimeters by 11 millimeters. They are widely used in smartphones, tablets, drones, and other compact devices due to their space-saving design. Despite their small size, microSD cards offer similar storage capacities and speed classes as their larger counterparts. Additionally, microSD cards can often be used in SD card slots with the aid of an adapter, making them versatile in many situations. When considering which type to use, it is essential to check the compatibility with the device in question. For specific technical details on speed classes and compatibility, visiting the relevant section on Lexar.com might provide valuable insights.