SDkortteihin

SDkortteihin is a Finnish term referring to SD cards, a type of flash memory storage device. SD stands for Secure Digital. These cards are commonly used to expand storage capacity in a wide range of electronic devices.

SD cards come in various form factors, with the most prevalent being the standard SD card, the smaller miniSD, and the even more compact microSD. Each size is designed to fit different devices, though adapters often allow for compatibility between sizes.

The storage capacity of SD cards varies significantly, ranging from a few gigabytes to several terabytes. They also differ in their speed classes, which indicate how quickly data can be read from or written to the card. Faster speeds are crucial for applications like recording high-definition video or running applications directly from the card.

SD cards employ a non-volatile flash memory technology, meaning they retain data even when power is removed. This makes them ideal for portable devices where continuous power supply is not guaranteed. They are widely utilized in digital cameras, smartphones, tablets, GPS devices, and gaming consoles.

The security aspect of "Secure Digital" refers to their built-in copyright protection features, though the effectiveness and implementation of these features have evolved over time and with different standards. SD cards are a ubiquitous and essential component of modern portable electronics, offering a convenient and often expandable storage solution.