As technology has advanced there are different devices that have come into play that help in transferring data. At one time it was difficult to transfer data between computers. Slowly as technology unraveled, the floppy drives were developed. They could hold only minute amounts of data but they were the start of a revolution. There were jump drives and finally, now we recognize memory cards.
These memory cards have immensely small sizes and are capable of holding Gbs worth of data. With advancement of technology, transferring data is no longer a problem. In fact, most people have shifted to cloud which allows them to access data wherever they go.