Need help Migrating

I currently have my Lightroom folders on and OWC 4M drive. This is 4x 4TB NVME drives set up as two raid 1. In total I have 2x4tb drive space mirrored as back up to 2x4tb nvmes. I thought 8TB would last a long time but, of course it doesn't. I have purchased an OWC Thuderbolt 4 housing with 4 x18TB HD drives set up as at RAID 5 for a total of 54TB drive space with one disk redundancy.

My plan is to:

1. Transfer my Libraries from the NVME drives to the Raid 5 54TB drive.

2. Reinitialize the 4x4TB NVME drives as a raid 0, 16TB drive- Giving me more space.

3. Transfer the libraries back to the 16TB raid 0 NVME drive to work from and use the larger raid 5 HD drive as back up.

Succinctly, can anyone tell me how to do this effeciently and safely? 

DO I:

1. Drag the libraries within lightroom to the new drive.

2. veryify that LR can see them and they work.

3. Reinitilize the NVME as a raid 0, 16TB drive.

4. Enter lightroom and drag them back to that drive?

Thank you!