This node writes out the input data table into a file or to a remote location denoted by an URL. The node provides many options to customize the output format (see below). But there is no checking done on the settings, so it is possible to write out the data in a format that makes it impossible to read it in again (e. g. if you specify no data separator).
Note that if the destination location is a remote URL not all options are available because in general it's not possible to determine whether the remote location exists. In this case it will always be overwritten.