Data HDD question

I have a six bay NAS.

I want to remove the six drives which have data on them and install six new drives.

When I install the six new drives and use them, I want to have the option to re-populate the old six drives in the future should I need to.

Can I achieve this by removing the six new drives and putting in the old six drives. The NAS model would remain the same and I would ensure to populate the drives in order .