Ensure every numbered file in the sequence is located in the same directory. Use an extraction tool:
You may be able to right-click the first file ( .001 ) and select Extract All directly in File Explorer. 25jkigfkpssj.7z.004
Do you have the of this archive (specifically the .001 file) saved in the same folder? Ensure every numbered file in the sequence is
You can use 7-Zip on any computer, including a computer in a commercial organization. You don't need to register or pay for 7-Zip. How To Open .7z Files on Android 25jkigfkpssj.7z.004
Use The Unarchiver or Unzip One to open the first part of the sequence.
Use an app like ZArchiver to navigate to the files and extract the .001 part.