i my little opinion these brilliant and big hard drives are good but its allso a good potential to lose a lot of data and precious stuff IF YOU DONT back up Frequently ive been there and done it
ive only got an 120gb hdd but with the talk of 300gb and terra's ouch it seems to be a cheap outlay of around $15 Aus For 10 x4.7 gb blank disks for backups
essecially if youre 300gb (or whatever size) is near on full
just my 2 cents (ive lost a lot of stuff cuz of the good ole windoze playing up and so forth

) (one instance it corrupted (windoze xp) all the data on the hdd so now i split the os from the data C= the os And D= for all the data so if the os chucks it i should at least get some of my data back (crosses fingers here). )
so as ive allways have been told backup backup blah blah blah