[RedNet][Programming] How do I copy a file through RedNet?

How do I take a file on my computer and send it through rednet? So I would want to be able to use

fs.copy()
fs.open()
fs.read()
fs.delete()

etc.

I'm very experienced with Rednet so if you need any other help just message me. Here's the code.

id = 3 -- Receiving computer id here
side = "top" --Modem side here

rednet.open(side)
file = io.open("data")
filedata = file:read()
file:close()
rednet.send(id, filedata)

And here's some extra code for the receiver

side = "top" -Modem side
rednet.open(side)
file = io.open("data", "w")
id, msg = rednet.receive()
file:write(msg)
file:close()

EDIT: You have to send the file line by line or it will be like this:

tArgs = {...}if #tArgs < 1 or #tArgs > 1 then  print("Usage: setup <modemside>")  return endsSide = shell.resolve(tArgs[1])rootDir = ""local file = io.open(fs.combine(rootDir, "pref"), "w")if file then  file:write("side="..sSide)  file:close()end