Micro SD cards are a format for removable flash memory cards. SD is the short form of secure digital. These are most commonly used in audio and video players, music players, cell phones and hand held GPS systems. They are also used in digital cameras. These are very tiny and the size of a finger nail.

The micro SD 4 GB is a small tiny card that is lie almost a quarter of the SD card and is one of the newest standard of the SD flash memory that is specifically designed for its use with the ultra small mobile phones and also other devices. Just like the mini SD, the micro SD card is also ideal for storing media rich files like videos, music and also photographs in the compatible mobile phones. There are a lot of these micro SD cards that are available in different storage capacities. The micro SD 4 GB card is the most recommended as it proves to be useful to the average man. Micro SD cards that have lesser memory might need you to carry more than one card. You also get micro SD cards that have more memory space but for the average man a micro SD 4 GB should be ideal to carry around for general use. These micro SD 4 GB cards also come with warranty nowadays.