This is the specifications for the archive file which is handled by the Game Extractor plugin Archive_VFS_SFV.

Endian Order:Little Endian
Compression:None
Encryption:None


This format is used by the following Games:
3SwitcheD *.vfs


This is the format specification information:
 
// ARCHIVE HEADER
  1 - Version (1)
  3 - Header (SFV)  
  
// FILE DATA AND DIRECTORY
  // for each file
    // except for the first file {
      2 - PK Header (PK)
      }
    4 - Entry Type
    2 - Unknown (2)
    2 - null
    8 - CRC?
    4 - Compressed File Size
    4 - Decompressed File Size
    4 - Filename Length
    X - Filename
    X - File Data


These are the accompanying notes and further information:
 
Basically a PKZIP archive with a funny header
No compression used in the archive


Game Extractor is able to read files of this type, as well as files from thousands of other games. To give it a try, download Game Extractor (Basic Version) for free, and see what it can do.

For further information on this format, refer to the source code on our GitHub repository.