Bbh100-1983.zip.001 -

Since standard Windows and macOS utilities often cannot handle split archives natively, you will need a third-party tool: How to Open and Extract .001 Files - Microsoft Q&A

The file extension indicates that it is the first part of a split archive . To open and extract the contents, you must have all the subsequent parts (e.g., .002, .003) in the same folder. How to Open the File BBH100-1983.zip.001