One can easily split VCF files into multiple vCard files with
CubexSoft vCard Splitter Tool. It is a safe way that retains contact details as it is. It is a Windows Operating Systems compatible program hence supports all Windows OS edition. And if you want to combine multiple VCF files into one VCF file then there is an impeccable vCard Merger available for all Windows OS versions. Take a trial with 5 files completely free of cost. Both the solutions are completely risk-free and user-friendly.