In a short answer it is both.
I know this may sound mad but it is, don't forget it is a USB, a Universal serial bus.
UNIVERSAL being the main word....
Don't forget, when you save data to your external you are writing to it as an outport, through USB.
When you retrieve data from it, it now becomes an in - out port, USB again, hence you get something from it.
I hope that clears up your question.
If you Google the question, it may give you a better explanation or answer, than I have here..
PC 2010
Main memory is neither of these.
A CDROM drive is neither an input device or an output device. A CDROM drive is a storage device.
It's an input and an output device. Programs and data are input from the hard-drive to the computer's memory for processing. The results are written back onto the drive when you save your work.
A CPU is a central processing unit. It is neither an input nor an output device, but it is usually connected to both kinds of devices. An input device would be a keyboard or a mouse. And output device would be a printer, a hard or floppy drive, or a memory chip in a thumb drive.
A Flash Drive can be an input, output or storage device. Hope this helps.
input
Disk drive storage can be both an input and an output device.
input
it is an input device
Input device (like a keyboard), output device (like a monitor), memory (like a hard drive), and processor (Intel is a designer of these).
RAM (Random Access Memory) is a storage device
a flash drive is an output device. A flash drive can fit into either category(input, output or storage). It simply depends on how it is used.