HardDiskSpace.lua

local component = require("component")
fs = component.filesystem
usedSpace = fs.spaceUsed()
totalSpace = fs.spaceTotal()
percentUsed = (usedSpace/totalSpace)*100

function round (num, numDecimalPlaces)
  local mult = 10^(numDecimalPlaces or 0)
  return math.floor(num * mult + 0.5) / mult
end



print(usedSpace .. " bytes of your harddrive are being used, it is " .. round(percentUsed, 2) .. "% full.")