The UniProt RDF distribution is over 5GB large. To help people retrieve the data more efficiently, we now mirror the data and provide a Metalink file that describes all the file locations.
Using aria2 – a command line download client that supports the Metalink standard – you can do:
aria2c ftp://ftp.uniprot.org/pub/databases/uniprot/current_release/rdf/RELEASE.metalink
This will retrieve the data from all available mirrors in parallel, piece the files together, and verify the transferred data with checksums.
If you prefer graphical user interfaces, there is another tool called wxDownload Fast. Be sure to use the latest version (0.5.5) – previous versions wouldn’t do parallel downloads from some servers due to a small bug.