Hi there SueVo,
It sounds like you're experiencing an issue exporting your iCloud contacts, and we'd like to share a resource that can help.
It may be expected for the contacts to export as one file when selected together. Learn more here: Archive or make copies of the information you store in iCloud
Specifically, review the steps below:
"Export contacts on your Mac
- Open Contacts.
- Select All Contacts.
- Click a contact in the Contacts list.
- Choose File > Export > Export vCard or choose Edit > Select All to select all cards for export.
- Choose where you want to save the files, then click Save.
If you use Groups, consider archiving your entire Contacts or Address Book database as well as exporting vCards. The vCard method above copies your contacts, but not Groups. Archives are more complex, but you might not be able to restore data using Archives while connected to the Internet and signed in to iCloud.
To export an archive, open Contacts and choose File > Export > Contacts Archive.
Export contacts from iCloud.com
Export iCloud contact information as a vCard.
Export contacts in Outlook on your PC
See Microsoft's instructions for exporting contacts."
We hope this helps!