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Contacts held as separate .vcf files will not import into a Thunderbird address book all at once.
My old PC is Windows 7 and I used Outlook. Each contact is held in a Contacts folder and are held as separate .vcf files. When I try to import them to my new PC (I now have Thunderbird on the new machine) each .vcf file ports separately as it's own address book one-at-a-time and it appears that I cannot consolidate then into one address book. How can I port these 213 files all at once into one address book file?