BadRequestError: Error code: 400 - {'error': {'message': "Invalid 'expires_after.days': integer above maximum value. Expected a value <= 365, but got 3650 instead.", 'type': 'invalid_request_error', 'param': 'expires_after.days', 'code': 'integer_above_max_value'}}
Expiration means the ID is gone. You can create a new vector store ID from files still in storage. You can also “keep it active”.
The default is never expiring, unless it is a vector store automatically created by file attachment to a user message of a thread, which is then seven days.