Thank you so much for recent help on a few topics.
i) is it possible to not only add new record but if already exists to overwrite or merge existing data. I was finding it created duplicate even where had the primary field value. There is not the possibility as far as I see to include unique ID in import which might be a way to show it is same data.
ii) I have a user record which links to a profile record whioh links to other records like staff. I have not found a way to create the link with csv file so right now for example upload 50 users to user db type, 50 profiles to profile db type, 100 staff to staff db type and then manually have to link all together one by one. As the amount of data is not very large it is doable but taking a few hours so wondered any ideas.
Thanks for this!