HD-QSSU2/R5 : How many TB do you need?

And another Buffalo device to host your external HDD! To connect those you'll have the choice between IEEE 1394, eSata, USB 2.0 and turboUSB (which is said to be 21% faster than the standard USB 2.0). For the drives, you can expect big capacities...basically 1/2/3 or 4TB and you have the possibility to set things up the way you want for the boot sequence, for example XP on one HDD, VISTA on another etc...last but not elast it can be used in RAID0, RAID1 and RAID 5 mode.