The source file can be a savefile, a file on the filesystem or a loaded resource, such as an icon.
// resources are specified with 'single quotes'
'icons/mob.dmi', "temp/mob.dmi")
(
// "double quotes" specify an external file
"temp/mob.dmi", "the_void/")
(
Parity Issue ⚠️
In BYOND, if both the source and destination have a trailing slash, they will be treated as directories. This recursively copies the contents of directories into the target path.