Choose a folder and click . Note: This does not work for password-protected files. Option B: 7-Zip (Recommended) Download and install the free 7-Zip utility . Right-click your file and hover over 7-Zip .

You will need a specific app to open these files on a phone or tablet.

Since "ott01.7z" is a compressed archive file, you will need a utility to extract its contents. Depending on your device, the process varies from using built-in tools to downloading free software.

Select or Extract to "ott01/" to create a dedicated folder. 2. Mac Users

macOS can sometimes handle 7z files with its built-in utility, but third-party apps are more reliable for this format. Right-click (or Control-click) the file. Select Open With > Archive Utility . Option B: The Unarchiver (Better for 7z) Download The Unarchiver from the Mac App Store.

Open the app once to set it up, then double-click your 7z file to extract it automatically.

If you are on Windows 11 (updated late 2023 or later), you can often extract these files directly. Otherwise, use the official free software. Right-click the ott01.7z file. Select Extract All… from the menu.