San's or Storage Area Networks are the devices used when making optical drives, or storage drives, such as usb flash drives. You can purchase these from companies like New Egg.
Portable & External Hard Drives.
USB Flash Drives are called thumb drives
USB, mini hard drive or storage device
Secondary Storage
USB flash drives
Solid state Flash drives USB Hard disks drives
Thumb drives, otherwise known as "USB Flash Drives" or "Jump Drives" are storage devices. You can store your data files plus you could store and run programs from the thumb drive.
secondary memories are the memories by which CPU proccesses his programs and application.
Allowing you to Plug in Separate Devices such as a USB mouse, an MP3 Player/iPod, a PSP, or Flash Drives which hold Storage. and Data Transfer
usb port jump drives and cd's
Hard disk drive inside the PC, CD or DVD drives/disks, USB (thumb drive, jump drive), and floppy disk drive/disk storage. Other storage can be external Hard disk drives, tape drives, RAID drives and the newer Blu-Ray.