For Example:

1. Create a Workbook with two sheets, the first sheet is connecting to “Group1 File 1.txt“, and the second one is connecting to “Group1 File 2.txt“.

2. Click Clone Import button, and select following files:

Group2 File 1.txt
Group2 File 2.txt
Group3 File 1.txt
Group3 File 2.txt

-->The first two files are imported into one new book, and others are imported into another new book.