QBW file is financial data file created by Quick Books money management software. When you condense a data file, Quick Books creates a separate QBW file with the name Archive Copy XX/XX/200X followed by the name of the QBW file.

This file is an exact copy of the company file before condensing, and can be used to look up information that was later removed during the condense process. In addition to this archive file, the condense process forces you to create a backup (QBB) copy of the file.