Another important factor to consider is warranty and reliability. Ideally, you would want the most reliable card possible so that your photos are never lost however, if the card does fail, then a long warranty will mean that the manufacturer should replace or repair your card. Although, recovery of images is unlikely when a card physically fails, recovery software can help recover accidentally deleted files, and some of these cards come with free recovery software. Reliability can't be determined on new cards, as it could take a long time for the card to fail, if it ever does. One thing to consider is how durable the card is and if you look at Samsung cards, for example, they are waterproof, shockproof, magnetic proof and come with a 10-year warranty so should survive much more mistreatment than others, as we found out in our test of one of their microSD Cards.