no new drive letter to see my hard drive

Hi i plug ed the unit with my sata drive in and i hear the connection sound but i cannot see any extra drive letter in my computter? whereis the drive? would appricate some help . windows 7 laptop

We worked with Gino via our private email ticketing system and are posting further details here for the benefit of others who may encounter this thread while doing research into an issue.

In this case, the drive was from a NAS device, which used a filesystem that Windows does not recognize when directly attached. By using a 3rd party program that installs a linux filesystem driver to Windows, we were able to get the disk recognized.