Help me, please. Problem about "maxSize" in CKFinder config

$config['ResourceType'][] = Array(
      'name' => 'Files',            // Single quotes not allowed
      'url' => $baseUrl . 'files',
      'directory' => $baseDir . 'files',
      'maxSize' => "10M",
      'allowedExtensions' => '7z,aiff,asf,avi,bmp,csv,doc,fla,flv,gif,gz,gzip,jpeg,jpg,mid,mov,mp3,mp4,mpc,mpeg,mpg,ods,odt,pdf,png,ppt,pxd,qt,ram,rar,rm,rmi,rmvb,rtf,sdc,sitd,swf,sxc,sxw,tar,tgz,tif,tiff,txt,vsd,wav,wma,wmv,xls,zip',
      'deniedExtensions' => '');