Hi Henry,

'Invalid drive specification' is a windows error that generally appears when a command (containing a drive letter) is run. The operating system is unable to find.
A new hard drive with 'Invalid drive specification' error indicates that it needs to be partition and formatted before being used.

You can follow the below fixes to resolve the issue.

Fix 1: Disconnect from the unavailable share, and then reconnect after you clear the Reconnect at logon check box.
To do this, follow these steps:

1. Click Start, point to Programs, and then click Windows Explorer.
2. On the Tools menu in Windows Explorer, click Disconnect Network Drive.
3. Click the network drive on which the shell folder is located. Click OK.
4. On the Tools menu, click Map Network Drive.
5. Click to clear the Reconnect at logon check box.
6. Type the network path for the location of the shell folder. Click OK.
7. Restart Windows.

I hope this helps.

Regards,
Lokesh