sending of data from a local system to a remote system that should store a copy of the data being transferred
File uploading refers to the sending of data from a local system to a remote system such as a server or another client with the intent that the remote system should store a copy of the data being transferred, or the initiation of such a process.1 The words first came into popular usage among computer users with the increased popularity of bulletin board systems (BBS), facilitated by the widespread distribution and implementation of dial-up internet access in the 1970s.
Questions having the tag file-upload regards the implementation and use of SharePoint file upload feature.
Reference: Wikipedia - Uploading and downloading