What is a Memory Card Reader

A memory card reader is the device that accesses the data that is stored on a memory card and allows a computer to use that data.  Memory cards are great for transferring photos or music between computers or from computers to mobile devices.  Memory card readers can be installed in computers or can stand alone and plug into your computer via usb cable.  They come as a single card reader or multi-card readers.
A single card reader is usually found as an external device.  These card readers are made for one particular size and format of memory card.  The major benefit of single card memory readers is that they are very small and can fit in any size pocket.  They can, also, be used as a portable flash drive when you need extra storage for your computer.  Some of these even look like flash drives.
The multi-card reader is another type of card reader.  These, too, connect to a computer via usb cable unless they are installed directly into the computer.  These can read several types of memory cards which is very convenient because, often, different devices require different types of cards.  External readers of this kind are still small and can be stored easily when not in use.  Some smaller storage cards may need an adapter to be read with multi-card drives.  However, most of these cards come with the needed adapter when you purchase them.
Readers that are installed directly into a computer are, basically, the same.  The difference is they will not need to use a usb cable to connect.  These can be either single card or multi-card memory readers.  Most new computers that come with a memory card drive installed us the multi-card type.  One benefit of having the reader installed is that you can't lose it unless you lose your entire computer.  These devices can be installed into most computers that have an empty drive bay.  If doing it yourself make sure you know what you need to do to install it before you open up your desktop or laptop case.
Flash memory cards provide us with the easiest and fastest way to transfer media between computers and portable media devices.  They are used in mobile phones, mp3 players, and many other electronics.  Having the correct smart card drive makes the process foolproof and allows you to spend less time moving files and more time enjoying your photos and songs.