My Passport Ultra 1TB HDD has become very slow from the past few days. I bought it 2 months back and it was functioning very well with average data transfer speed of more than 20mbps. Suddenly this speed has dropped to around 70kbps. i have almost 500GB personal data in it which now i am not able to access with ease. I guess it would take me months to back up my data. Need an assistance on this.