If you try to separate a vCard file exported from Gmail or Android without losing special fields (picture, notes, custom labels, etc.), use an offline computer tool like WholeClear Split vCard Software. This program can run standalone (offline), supports all vCard versions (2.1, 3.0, 4.0), and keeps every contact and contact attachment together (images, email types, address, etc.) when splitting. This tool does not require the internet. A free demo is also available for all users.