formatBytes function
Converts bytes to readable size
Implementation
String formatBytes(int bytes, int decimals) {
if (bytes <= 0) return "0 B";
const suffixes = ["B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"];
var i = (log(bytes) / log(1024)).floor();
return '${(bytes / pow(1024, i)).toStringAsFixed(decimals)} ${suffixes[i]}';
}