You cannot open this file individually. You must use a utility like 7-Zip or WinRAR to open the .001 file, which then automatically bridges the subsequent parts to reconstruct the full data.
Run the file through VirusTotal or a local antivirus program. Even if the .001 header seems clean, the full extracted content should be scanned. SB04.7z.001
If you are missing any numbered parts in the sequence (e.g., you have .001 but not .002 ), the archive will be "corrupt" or "incomplete" during extraction. You cannot open this file individually
