The History from the Disk Drive to the USB Flash Drive
A longt time ago floppydiscs were still used as a storrage medium. The actually PCs do not even have a floppy discdrive anymore, and so its not possible to read-out the floppy discs. Plastic cards have 1.44 MB disk space. You could format them as required and to store new venues. Next was the CD-ROM.A half century ago, the standard PCs had indeed already a standard CD-ROM drive, but it took some time to have the CD writer fitted as standard in laptops. Until then, there were many applications to buy on CDs, but data storage was not possible on them. Quite at the same time then the USB sticks, SD cards and external hard drives came to the market place.
The data storage medium of today
The Micro SD card has the advantage that it is smaller and is used as a storage medium in digital cameras, for example. As a disc outer of such devices, it is rarely used, because not every computer has a SD card slot. Therefore these cameras always are supplied with cable to connect the device directly to the working station. The external drive has massive memory space, the current ones have 1000 GB, or 1 TB in size. However, most need an external own power source, they ar heavy and unwieldy. Better as this is the Memstick. All PCs have about one or more USB reader, the stick needs little power and is easy to carry in your bag. These three storage media are always refined and getting more and more storage space. The current speed of development is such that the capacity every year doubles. However not in price. A year ago you got an external discdrive with 500 GB for about 100 . Today they are twice as large for the same cost.