Big VCF files open slowly. Access is slow. Finding contacts is hard. All contacts are in one single VCF file; it makes it very hard to organize the contacts.
Simple fix for this. Softaken Split vCard Software splits big files into smaller ones. Data stays the same.
Once the file is added, the contact list will be shown on the interface for processing. The contacts will be segregated and saved in smaller files with all the necessary details like the full name, phone numbers, emails, and all the other contact details.

This tool can handle vCard versions 2.1, 3.0, and 4.0 and is compatible with mobile phones, webmail, and contact application programs. It can work with large-sized VCF files with no problems, while selective splitting is also possible.
A free demo is available to check the functionality before using the full version.