Upload/download
The phrases download/upload and upload/download describe the sending (upload) and receiving (download) of information on a network or over the Internet. For example, while browsing the Internet, you send a request (upload) to a server that returns information to you (download). In other words, when your browser requested this web page, it sent (uploaded) a request to our server, which responded with the files needed. Once those files are downloaded to your computer, the page is displayed. If you have a slower connection, you may even notice each of the pictures and other web page elements appear as they finish downloading.
See our download and upload page for a full explanation, examples, and related links about these terms.
Upload and download only describe sending and receiving information over the Internet. When describing copying or moving files on the computer (e.g., copying to a USB (universal serial bus) flash drive), refer to the terms copy or move, depending on the action you're performing.
When connected to the Internet, your modem or router lets you download and upload files. However, it's common for most Internet connections, such as cable broadband, to be asymmetric, which means your download speed is different (usually faster) than your upload speed. However, a fiber connection is symmetrical, which indicates the upload and download speeds are the same. If your upload speed is slower than your download speed, you have an asymmetric connection and nothing is wrong.