V7 V7U3-IDESATA-BLK Manual De Instrucciones página 5

Using a drive with existing data that Windows does not recognize
If Windows does not assign a drive letter for a drive with data on it, it is because Windows
does not recognize the partition on the drive. This is common if the drive came from another
operation system, if the drive is encrypted NTFS, if it was partitioned with a third party utility,
or if some or all of the data on the drive is corrupted. Unfortunately, there is not a practical
workaround. The drive may work if it is erased and reformatted, but the data may not be
recoverable.
Macintosh OS X
When you install a new drive using OSX, the Application "Disk Utility" is what you use to Partition,
Format, RAID, Test, or Erase the drive. Disk Utility is located in the Applications/Utility folder.