Board Thread:Questions and Answers/@comment-84.74.21.186-20130126225217/@comment-109.246.47.139-20130223224655

Just for anyone who cba to go read the ComputerCraft wiki, the command is

[copy "source" "destination"]

where source is the name of the file (full name including folder paths, assuimg you are at the home screen) and destination is (usually) "disk".