Hi - I have two NAS200's for years - I have them both setup as RAID 1. I also purchased Vicaversa replication software - to copy all data from the 1st NAS200 (NAS1) to the 2nd (NAS2). In essence, 4 x 1TB really equals 1 TB usable as data is copied from NAS1 to NAS2 when ever it detects a change. I also do NOT delete data from NAS2, so always adding (even if deleted off of NAS1). A couple of days ago, a fan seemed to start failing in NAS1 - really LOUD - had to turn it off over night. I just got a used NAS200 from Ebay - setting it up exactly as I did for NAS1 (calling it NAS1A - in memory of; i will fix the fan - but want to keep my data up). Question - Can I 'simply' put the drives from NAS1 into NAS1A? I assumed so - but I figure I would ask before I do anything. I would think it would just read the drives as is - but rather not assume. I am just updating the Firmware to the latest on NAS1A and about to try. Any input would be great! Thank you.