If you want to store your IBM Notes contacts on an external drive, it's easy to switch them to vCard (VCF) format. Almost all devices and platforms support the vCard format, which makes it a great way to keep contacts protected. You need to export your contacts from the NSF file into the VCF format to complete this task. GainTools NSF to VCF Converter can perform the is rapidly and without losing any data. This application lets you convert one or more contacts at a time and keeps all of their information, like names, emails, phone numbers, and addresses, safe during the conversion. You can effortlessly copy the contacts to any external disk for a safe and easy backup once they are in VCF format.

Read more- https://www.gaintools.com/address-book-manager/