If this returns false, then a tmp file is created for it. This means that you can also convert this to a JSFile and call rename() on it.
But the method write(file) will always work by writing the contents of this upload file to a different file.
Returns
Boolean true if this upload is fully in memory (not saved to a temp file)
Supported Clients
SmartClient,WebClient,NGClient
Sample
write(file)
Writes the contents of this upload right to a file. Use the file plugin to create a JSFile object that can be given to this function.
If this file was not fully in memory (isInMemory == false) then this will just stream the tmp file to the give file.