First-time poster and near-luddite here. Over the years I've picked up a number of LaCie external hard drives -- one 4 bay fw800, one 2 bay thunderbolt, two 2 bay fw800s (one of which only seems to work via fw400 or usb2), one 1 bay fw800/usb3 and various portable HDDs (various brands). I've managed to fill my total storage to about 70-80% of total capacity, spread out over all the externals. My question is this: without spending money on yet another enclosure/array I'd like to consolidate all my data (approx 12-14 TB!) onto one or two devices (presumably the 4 bay fw800 and possibly also the 2 bay thunderbolt) and use the other ones as backup. To do so I figure I'll want to swap all or most of the old drives out for new 4TB ones, but I'm not sure the safest way to go about this and whether I can use any drive in a LaCie enclosure. (Am considering these -- Seagate Desktop HDD 4 TB SATA 6Gb/s NCQ 64MB Cache 3.5-Inch Internal Bare Drive ST4000DM000 -- since they're well-reviewed on Amazon and only cost $150 per.) Would it make sense to get one of those bare drive holders (approx $50 from OWC) and copy everything over first, then replace and store old drives offsite as yet another backup? Any help much appreciated!