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This new 40TB hard drive from Seagate is just the beginning—50TB is coming fast!
(www.techradar.com)
This is a most excellent place for technology news and articles.
They're not really meant for desktop use, so not really an issue. Also don't keep your servers under your bed, the ventilation is quite bad.
Yup, if you can put em in a closet or something, you're golden.