This is because the EG Launcher is seeing you ran out of space. Free up more space on your HDD/SSD and then restart the update (unless you are saying its STILL past that point trying to download 55gb).
PS (directed at OP): Letting your HDD get filled past 50% capacity space wise is a REALLY BAD habit to get into. It will destroy your HDD speeds and bog down the drive to the point of it being nearly unusable. Don’t install the ADK on a drive with very little space left on it, that is just a disaster waiting to happen if you ask me >.<