Hi Dev,

this pretty little snippet am about to share, will allow you to convert file size in bytes to human-readable format...

Fun/method code named fileSize

fun fileSize(size2:Int):String {
        val size = size2.toLong()
        if (size <= 0) return "0"
        val units = arrayOf("B", "kB", "MB", "GB", "TB")
        val digitGroups = (Math.log10(size.toDouble()) / Math.log10(1024.0)).toInt()
        return DecimalFormat("#,##0.#").format(size / Math.pow(1024.0, digitGroups.toDouble())) + " " + units[digitGroups]
    }

are you have any problem using this code?

i will be happy to help via the comment section 

Happy Coding!