While 上传 (shàngchuán) is a modern, functional term without deep ancient roots, its use is central to understanding modern Chinese culture, which is deeply integrated with technology. The act of “uploading” is a gateway to participating in China's massive digital ecosystem. Unlike in the West where digital life is spread across many different apps and websites, in China it is highly concentrated in “super-apps” like WeChat (微信 Wēixìn) and video platforms like Douyin (抖音 Dǒuyīn).
Therefore, knowing the word 上传 is your key to participating in, and talking about, everyday digital life in China.
上传 is a neutral term used in both formal and informal situations. You will see it and use it constantly.
The biggest point of confusion for learners is mixing up “upload” with its opposite, “download.”