Respuesta :
A Compact Disk (CD), and Digital Versatile Disk (DVD), a floppy disk (if they still exist), a flash disk, and even a portable hard drive are all secondary storage devices.
a USB is used to connect media devices to a PC
a SD card is used to store information on an external device
So an SD card is an secondary storage device
a SD card is used to store information on an external device
So an SD card is an secondary storage device