Your external hard drive is evidently formatted as FAT32 and not NTFS.  FAT32 has a restriction of maximum of 4gb file size (NTFS doesn't), so Ghost 9 breaks the backup into 4gb chunks.  The .v2i is the first chunk.  The s01.v2i is the 2nd chunk, s02.v2i is the 3rd chunk.  The sv2i file is just an index and can be ignored.

If you want to restore you would select the first .v2i main file.

You can test restore a file or folder by running the Ghost 9 explorer program, or just double clicking on the main backup file; then select a test file and restore it to a temp folder on your pc.

You should also run a small file test restore by booting from the Ghost 9 emergency restore CD and make sure it works in your configuration.