.tar.7z indicates a tar archive ( .tar ) compressed with 7-Zip ( .7z ), which suggests a high level of compression on a potentially large dataset.
This is almost certainly a backup of software source code or digital assets from 2010 or earlier. 20100713cvs_backup.tar.7z
Without access to the actual contents, this file is a , essential for auditing older development projects, restoring legacy systems, or investigating historical source code changes as of mid-2010. this file is a