Transferring stuff between your PC and phone usually needs a USB cable. You could also try pairing the PC and the phone using Bluetooth, but transfer speeds usually suck! Browsix lets you do all this through Wi-Fi.
Apart from just transferring music, videos and other files, you can also send or receive text messages on your browser. You don’t have to worry about security as Browsix secures access to your phone. Also, there is no limit of uploading files so go ahead and upload that huge movie onto your Android phone.