External hard drives are becoming very popular due to their size, portability and capacity. Nowadays, You can get a 500 GB hard drive for a reasonable price. But the problems with USB hard drives are: they’re too slow and drain too much CPU resources.
Look at how time have changed. in 1956, IBM’s RAMAC was the first machine with a hard disk, which was way ahead of its time. Each of its 24″ diameter platters held a whopping 100,000 characters for a total of five million characters. Nowadays, most of us wouldn’t want anything less than 300 GB, heck, even our USB drive hold much much more data than the RAMAC.
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