Before you can open the file, you have all the associated parts (e.g., .7z.002 , .7z.003 ) in the same folder . If any part is missing, the extraction will fail with an "Unexpected end of data" error. Step 2: Extract the Files
7-Zip will automatically find the other numbered parts and combine them for you. Download an app like RAR from the Google Play Store. Locate the .001 file within the app.
Open the .001 file, and it will handle the joining process automatically.