After about 6-12 months you will find you don't reference the old chart that much, the information is in the new chart.
This brings up an interesting point and one I thought about before transitioning from paper about 2 years ago, and Liliya I do not know if this is the case for you.
However, I did minimal scanning of old records from the old paper charts into AC, moved all the paper charts into my office from a centralized chart area. I did this for two reasons, one practical the other psychological.
I predicted that what Wendell just stated above, and it has panned out. The paper charts are obsolete now and still available for the occasional referencing and scanning if needed. Scanning the chart in whole is a lot of busy work for naught, in my opinion.
I have not had any regrets doing it this way and would do it again in a heartbeat.
What I did instead was input all of my own data, copied and pasted the past med history, entered meds, social hx and family hx myself. It was time consuming and painful the first 6-9 months, but a good time to reorganize and clean the record up after 18 years of practice.