WD 4TB Sharespace support Seagate 2TB HDD?

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Hi WD team/ Cyberblitz, Thanks for updated. I have one more query – my plan is to upgrade existing 4x1TB HDD to 4x 2TB HDDs with new RAID 5 setup. Can I use new 2TBs four WD cavier Green HDD in Sharespace for a RAID 5 configuration? and also very rarely I want to access the data from my old configuration ( 4x1TB WD caviar Green RAID 5 - I want this RAID 5 setup , this 1TBs HDDs I want to keep in offsite ) . Many thanks