The cryptic phrase "170 top" likely refers to a within a specific institutional or forked version of this uploader. In high-throughput environments (e.g., a university digitizing 170 rare books simultaneously), the uploader must decide which file gets bandwidth priority.
Version 1.7.0 of the HTML5 Uploader serves as the "Scanner" backend for thousands of community-uploaded items, ranging from software ISOs to personal media . Uploading – Tips - Internet Archive Help Center