Backups onto my older Sata 3 5400 rpm My Book are taking too long, and interfering with other things. I'd like to buy a 3TB external HD for backup and a 3.5" external case for it. I'm thinking of a Hitachi P300 for the HD, since many enterprise drives are noisy and there may be size compatibility between the HDD and enclosure. Is the noise issue common? What recommentations for HDD and enclosure might you make, if you were retired and on limited income? I may buy the enclosure now, and wait for Cyber Monday for the HDD. Thank you in advance! Rick