1. Put the drive internal and run a Drive Fitness Test such as Maxtor PowerMax.
2. Try another enclosure. Early units did not support such large disks.
I was given a Maxtor 80GB hard drive that was used in a mobile rack. When I installed it in an external USB station I get a USB error code 47. I tried re-installing, re-booting but nothing corrects the problem. The external USB station works fine with my my old Maxtor 7GB hard drive. My computer is an HP Pavilion with a Pentium 4 processor. Any help will be appreciated.