Yes, I am filing away old clients folders into boxes to be stored. I have given each one a closed number. On the boxes I have labeled them with a letter, A-Z. Now I am at the last letter of the alpha. Should I begin again with A-1, B-1, C-1.? Do you have any suggestions?

Are you going to send these boxes to a storage facility like Iron Mountain? If so, they will supply a barcode for each box,