When purchasing memory cards for your digital camera, consider both durability and capacity. Compact flash cards are typically more robust than SD picture cards and the reason they are seen on professional cameras with full-frame sensors. It’s important to purchase the “high speed” memory cards, such as the SanDisk Extreme series and the Lexar Professional series.
There are now memory cards on the market with capacities to 32 Gb, but it’s wiser to record your images across several smaller cards than depend on a single large card to save your images. In the event of loss or accident, chances are you will still retain most of your work. Buy a waterproof memory card wallet (plastic with neoprene seal). Most imporantly, be sure you transfer your work to your laptop computer or memory storage device as soon as possible.