You may be able to right-click the first file ( .001 ) and select Extract All directly in File Explorer.
Do you have the of this archive (specifically the .001 file) saved in the same folder? 25jkigfkpssj.7z.004
Use an app like ZArchiver to navigate to the files and extract the .001 part. You may be able to right-click the first file (
Use The Unarchiver or Unzip One to open the first part of the sequence. 25jkigfkpssj.7z.004