Hw to change back from RAID1 to standalone disks and retain data?

[chrisatx]

Currently: I have four 2TB disks in the Linkstation Quad Pro. 

Goal: Have two 2TB disks in the LSQPro and put two in a backup storage bay on my Mac.

How to achieve this?

1) I want to keep the data from the disks so I would want to change the RAID1 with preserving the data. Will it need to rebuild or anything? How long will it take?

2) I want to copy the XFS data from the NAS to an external storage bay on the Mac.

a) The XFS currently contains mostly media as well as windows executable that I will at some time install on my Mac through Parallels. I just want to keep all operational.
b) I am using AFP and Windows protocol on the NAS as well as ftp/sftp.
c) What should I format the external bay in under Mac OS X Mountain Lion so I can easily copy the data from the NAS to the Mac external storage and back. I ask this because I had some trouble copying back files and folders to the NAS that I had copied to the Mac storage bay on HFS+.

[chrisatx]

Anyone?

[davo]

you cannot change the raid mode in the unit without the data on the disks being erased.

[chrisatx]

Wish I could keep the data instead of having to copy it via another disk onto its own disk once again.

Thanks for the answer though Davo.