An SD card is just like a small hard drive — it's a device that can store and transport large amounts of data. If you've been using an SD card for a long time, you might need to clear it out.

This has tainted my Android experience ... slots and cards are resulting in loose connections that make SD cards prone to spontaneous loosening and/or popping out. This can be aggravated if ...

The SD card in your camera needs to be large enough and fast enough for the way you shoot. Beginners and professionals will have different requirements, as will photographers and videographers.