Removable storage media used to store digital images in the camera. They come in different types (SD, Compact Flash, XQD, CFast), different capacities and speeds.
A unit of storage used both for computer hard disks (and SSDs) and for memory cards. 1GB is approximately 1,000 megabytes.
Completely wiping a memory card so that you’re starting again with a clean slate, so to speak. It’s not essential if you only ever use one camera, but if you use the same card in more than one it will clear up unwanted files and folders left behind by other cameras.
A brand of memory card that includes Wi-Fi capability so that you can transfer photos wirelessly to a smartphone, tablet or computer. More and more cameras are coming out with Wi-Fi built in now, though, so these provide the same functionality as Eye-Fi cards.
An older, larger memory card type still used in many professional cameras. It’s around twice the size of the more recent SD card format and thicker too. Compact Flash memory card capacity is measured in the same way in GB (Gigabytes) but speed standards may vary, especially for video use. Professional CF cards offer the same speeds and capacities as pro SD cards.