Yes, you can copy the contents of one bank and paste it into another bank on the BCD260DN. This can be done through the programming software rather than directly on the scanner itself. Once you have the bank configured the way you want, simply duplicate it and assign it to another bank.
Keep in mind the BCD260DN uses a traditional bank/channel memory structure (10 banks with 100 channels each) rather than the dynamic memory used in the SDS or x36HP series, so organizing and duplicating banks is a common way to manage similar channel groups.