Ovc.7z.001 -

: High-efficiency video compression data.

: The 7z format often provides a better compression ratio than standard ZIP files, especially for large datasets or media files. Steps to Open and Extract OVC.7z.001

7zip file with numbers on it like 001 means that you only have a part file of the whole compressed file. Microsoft Learn Does 7z compress better than zip? - Microsoft Community Hub : High-efficiency video compression data

When a user compresses a very large file, they can choose to split the archive into several volumes (e.g., OVC.7z.001 , OVC.7z.002 , OVC.7z.003 ). Microsoft Learn Does 7z compress better than zip

: Ensure you have all related files (001, 002, etc.) in the same directory. If any part is missing, the extraction will fail.

: This signifies the primary part of the sequence. You cannot extract the full content without having all the subsequent parts in the same folder.