From the Admin Guide (Windows)
"...
UNIX conventions that are permitted on Windows
You can use UNIX conventions in the backup selection list for Windows clients. UNIX conventions are similar to those for Microsoft Windows, with the following exceptions:
■Begin each line with a forward slash (/).
■Omit the colon (:) after the drive letter.
■
Specify / to back up all local drives except for those that are removable.
The following example uses UNIX conventions:
/c/
/d/workfiles/
/e/Special/status
/c/tests/*.exe
..."