The internal data and structures of split Zip files are identical to those of spanned Zip files. The only differences between them are the names of the parts, that is:
Each part of a split Zip file has a different extension (such as 'mysplit.z01', 'mysplit.z02', etc., and 'mysplit.zip' for the last part). While all parts of a spanned Zip file have the same name (such as 'mysplit.zip').
Please follow the below mentioned procedure to repair your split Zip files: