Not sure if this is the right spot to ask. I currently have a media player and I use two external USB drives which both are full (1 is dying :S). I need more space and my media player only has 2 USB ports, so buying another external drive is annoying having to plug in/out drives along with more power adapters etc. As time goes by, I can only see myself needing more and more space. So I'm looking at the Lian Li EX-503 external bay enclosure for something neat and small (NAS too expensive). I basically decided I need to choose between JBOD, RAID 0 or 5. I understand Raid 5 has parity files, so if one disk dies, I can still access data and replace the faulty drive with a new one, and that raid 0/jbod doesn't have any data protection/recovery. I also understand basically you loose 1 drives data in Raid 5 due to parity (repair) files. I don't entirely require RAID 5 as my mate will have the same setup/data, so we ourselves will be the backup so to speak. I would assume the likely hood of two raid 0/jbod failing at the same time would be minimal? I guess that leaves me to decide between raid 0 and jbod? My question with a RAID array is, can you "add" additional hard drives later on after you've created a raid array or do you have to create a new array in which it deletes/looses the current data when adding another drive? So say I bought 3x 2TBs, which keeps me happy with 6TB total, when its full, I cannot simply add another 2TB into a RAID 0 or 5 array without having to create a new array which intern deletes/removes the data, which then I'd need to copy the data again from my mate correct? Do the physical drives need to be the same model/brand? But I can add additional drives of any size/brand at any time if I go with JBOD without loosing any data correct? As I understand JBOD, its just multiple disks that show as one large disk. It fills the first drive, then onto the second, etc etc, so I don't see why you cannot just add additional drives when required which just increases the total storage without removing/deleting the current data? I guess if thats the case, thats a big advantage of JBOD over RAID 0, as I don't need to copy/paste everything over again if I need to create a new array due to adding HDDs/increasing space? How long would it roughly take if you were to create say a 8TB RAID 0 array, then copy/paste say 6TB of data via USB 3? Also, how do you know when a drive is failing/dying in one of these enclosure boxes? Do you run chkdsk on them or HD Tune etc? Can you select the individual drives when their set in a RAID array or JBOD and check the health status of each individual drive, or are there LED indicators on the box etc which are hardware controlled which show the status of the drives, or is there Raid/JBOD software you install etc to test each drive? I ask this because my silly external drive is coming up with "cannot read from the source file or disk" for certain files when I try to play or copy the file, chkdsk shows no issue, chkdsk /r states bad sectors, hdtune shows 2x warnings, yet I'd say 90% still read/copy fine (currently trying to backup as much as I can ). I didn't know anything was actually wrong until I tried to copy the files, so in this case would a RAID/JBOD pick something like this up? Hope that makes sense, really tired, so late... Cheers.