Adding or removing a single file requires rebuilding the entire archive, making it slow.

Solid archives often show a lower number of pack streams/folders when inspecting properties in 7-Zip.

What are you using (e.g., 7-Zip, WinRAR, a mobile app)?

If the archive is corrupted, it is more likely to lose all data rather than just the corrupted file.

To help you specifically with , could you tell me: Are you trying to extract it or create it? Are you getting any errors ?