The records of the OC need to be held for seven years. The act does not specify the form that they need to be held.
Its likely your new strata manager will charge to load all the records you want. Secondly don’t expect the portal of the new strata manager to be the same as the previous one.
I would suggest that you get all the records from the old strata manager on a usb stick. You can then store the usb and a secure copy, for searching in the future.