When you’re handling hundreds of vCard files, doing it manually is not practical. Most people try opening files one by one or importing them into Gmail or Outlook but that slows things down quickly.
Manual methods usually cause a few common issues. Duplicate contacts appear, some fields don’t transfer properly, and it becomes hard to keep track of which files have already been processed. With large numbers of files, even a small mistake means going back and checking everything again.
In migration work, professionals normally prefer batch processing, where all VCF files are combined at once into a single file instead of handling them individually.
For this type of task, GainTools Address Book Manager is used in some cases because it can take multiple VCF files from a folder and merge them into one output file in a single step.
Just make sure to keep a copy of original files before merging in case you need to verify anything later.
