Not all Memmory Cards you Buy are
Buy Speed Rated for Speed
When you go out and purchase a New Camera or buy a memory card for a OLD Camera or Purchase a Memmory card equiped device make sure you look at the product before you purchase it. If you have a older camera and purchase a SD speed rated at 100x; it could improve how fast it takes pictures.
Cheap doesn't mean quality
There are many types of Secure Digital Cards out there.
Speed rated memmory cards will allow you to take pictures faster (time after time) and transfer your files from your memmory in less time.
Some older camers will not accept memmory cards with that are SDHC.
SDHC= Secure Digital High Capiticity
SDHC = will not be faster unless its made to go faster and is speed rated.
Speed rating looks like 100x 60x or 10x or 15mb/sec or 30mb/sec
otherwise note most SD and SDHC are rate in 15 to 20X so they are slower when you take pic after pic.
* the above images were borrowed from Best Buy Website
Spacesbox and Best Buy has No Affiation.
Needed great quality images and did not have the funds to purchase and take pics of said Memmory Cards.
These were used in Educational manner.