Abstract: A server includes a processor and a storage unit, the processor arranged to control operations of the server. The storage unit is arranged to store a program code, which is read by an electronic device via a network and executed by a browser of the electronic device. When the program code is executed by the browser, the browser performs the following steps: receiving an upload command, and copying a file corresponding to the upload command to a virtual file system provided by the browser; partitioning a file into a plurality of portions; sequentially uploading the portions to the server via the network, and recording an upload progress of the file; and when the upload is interrupted and the electronic device re-uploads the file, the browser directly uploads the remaining portions of the file that have not yet been transmitted to the server according to the recorded upload progress.