Use `$user` as Share Name with SMB External Storage

[slater0013]

Is your feature request related to a problem? Please describe.

Our HomeDirectory is accessed via \myFileServer\myLogin ! The share name is directly your login. External Storage does not handle $user in ShareName but only in SubFolder configuration input.

Describe the solution you'd like

Since $user can be used in SubFolder configuration input, please make it possible to use it in ShareName.

Thanks ;) GS.