Sonic Panel no longer provides FTP accounts or FTP uploads, simply because we use the latest browser upload techniques which is 100 times faster than FTP upload speeds and does not cause multi-language mp3 file naming issues.
Log into your Sonic Panel, use the Playlist Manager link from the left menu, select your playlist or create a new one. Click upload button, you can drag and drop your multiple mp3 files to upload page or click to select mp3 files. The chunk upload system will upload your files with turbo upload speed. You will notice your new music files immediately in the playlist without reloading or waiting.