Large files are often "split" into smaller chunks (like .001, .002, .003) to make them easier to upload or share.
Based on the "MIICDV" prefix, this naming convention is frequently associated with high-quality scans of manga or digital comics shared on archival sites or forums. How to open it:
Right-click on the first file (.001) and select "Extract Here."
If you only have this specific file (.002), you won't be able to view the content until you find the first part of the set.
Ensure you have MIICDV30038.7z.001 , MIICDV30038.7z.002 , and any subsequent numbers.