Take one minute of video. Look at the file size. Now how many of these 1 minute files can you fit onto an 8GB card in your particular format and camera/device.
SMS stands for Short Message Service, which is the formal name for text messaging. It's a way to send short, text-only messages from one phone to another. These messages are usually sent over a cellular data network. That's not always true, though, as in the case of iMessage below.
SMS stands for S hort M essage S ervice, and is designed specifically for cell phones. You can usually send an SMS message to a cell phone via email. Most of the cell phone providers have a special email address or domain that you can send a message to, which then gets forwarded as a text message to the cell phone.es, you can get email on your phone! All you need to know is your cell phone's email address. Most carriers have SMS gateways which take email messages from the Internet and deliver them to their customers' cell phones as SMS text messages.