MemoryChecker

--With big love by AZ

function drawProgressBar(x, y, width, percent, color)
    local fill = math.floor(width * percent)
    term.setCursorPos(x, y)
    term.setBackgroundColor(color)
    term.write(string.rep(" ", fill))
    term.setBackgroundColor(colors.gray)
    term.write(string.rep(" ", width - fill))
    term.setBackgroundColor(colors.black)
end

local function checkStorage()
    local totalSize, usedSize = 0, 0
    local disk, diskStr = 1, "disk"
    for _, side in ipairs(peripheral.getNames()) do
        if peripheral.hasType(side, "drive") or fs.exists(side) then
            if disk ~= 1 then
                diskStr = "disk"..disk
                disk = disk + 1
            end
            local free = fs.getFreeSpace("/"..diskStr) / 1024
            local total = free + fs.getSize("/"..diskStr) / 1024
            totalSize = totalSize + total
            usedSize = usedSize + (total - free)
        end
    end
    return totalSize, usedSize
end

local function checkMemory()
    return math.floor(fs.getCapacity("/") / 1024), math.floor(fs.getFreeSpace("/") / 1024)
end

term.clear()
while true do
    local totalMem, freeMem = checkMemory() -- pc
    local totalSize, usedSize = checkStorage() -- disks
    term.setCursorPos(1, 1)
    term.setTextColor(colors.white)
    print("Space: " .. math.floor(freeMem * 10000 + 0.5) / 10000 .. "KB/" .. math.floor(totalMem * 10000 + 0.5) / 10000 .. "KB")
    drawProgressBar(2, 3, 20, (totalMem - freeMem) / totalMem, colors.red)
    print("Used: " .. totalMem-freeMem .. "KB \n\n")

    print("Disk space: " .. math.floor((totalSize-usedSize) * 10000 + 0.5) / 10000 .. "KB/" .. math.floor(totalSize * 10000 + 0.5) / 10000 .. "KB")
    drawProgressBar(2, 8, 20, usedSize / totalSize, colors.red)
    print("Used: " .. usedSize .. "KB \n\n")

    sleep(1)
end