Sure your Samsung Fascinate comes with 2GB of built-in memory, but if you plan to keep a personal collection of your favorite movies, music, and apps then you're going to want to upgrade to a memory card that can support that kind of data. Sizes from 2GB all the way up 32GB; There's no reason your Samsung Fascinate should have to be bogged down from an accumulation of personal data.
Memory Cards allow you to store a much larger amount of personal data, whether it be music, movies or apps. By simply inserting these microSD cards into the back of your Samsung Fascinate, you free up internal phone storage and are able to manage your data more efficiently.
Memory Card Readers make it extremely convenient to transfer the data stored on your memory card(s) via the USB plug on the card reader. When you're done, simply unplug the card reader and clip it on your keyring or keep it in your pocket.