Right now in my pocket is a common eight-gigabyte flash drive. Nothing special, but handy to transfer files between computers. I think I got it on sale for about $15.
But a gigabyte is one billion bytes. Each byte is eight bits and each bit is stored by two transistors, so, in my pocket, are 128 billion transistors! If each were a grain of sand, Jersey shore size, a quick calculation shows that would be over 16 cubic yards filling three dump trucks.
Even Carl Sagan would be impressed.
P.S. Where giga- was once only imaginable, then possible, and finally common. we now have tera- (0ne thousand giga-) becoming common. On the horizon that you may hear of someday, if only in a crossword puzzle, are peta- (one thousand tera-), exa- (one thousand peta-), zetta- (one thousand exa-) and yotta- (one thousand zetta-).