Deluxe.rar Instant

To extract a single file from the middle of a solid archive, WinRAR must analyze all preceding files, making extraction from the middle slower than traditional methods. However, extracting the entire archive is not significantly slower.

Here is a solid write-up on what this means and its pros/cons based on standard technical documentation: Key Characteristics of Solid Archives DELUXE.rar

This helps me guide you on the best software or settings to use. Don't Use ZIP, Use RAR - Coding Horror To extract a single file from the middle

Instead of compressing each file independently, a solid archive treats them as one big chunk of data. Don't Use ZIP, Use RAR - Coding Horror

Updating or adding files to an existing solid archive is slower because the entire archive often needs to be re-processed.

Best for archival purposes, distributing software, or backing up folders with many similar files where maximum compression is needed.