![]() ![]() A four-slot hub can function with a single HDD, for example, though it's better to use at least two drives so you can make use of RAID (see What is RAID? below) features. You don't have to fill every bay in the NAS drive either. For example, if you buy two 2TB drives and later find that they're just not big enough, you can replace them with bigger drives – up to 10TB each (the current maximum consumer HDD capacity). ![]() ![]() Some populated models don't allow user replacement of the drives, but those that do and similar unpopulated units offer one significant advantage – they let you swap hard drives as needed so the hub can grow with your storage needs. NAS units can be purchased with drives already inside (populated) or as a hub into which you can insert your own drives (unpopulated). NAS hubs are usually self-contained and, aside from the initial set-up, don't require a separate computer to work, just a network and/or an active internet connection. It's like a small computer dedicated to storage, streaming and data sharing, and it's usually a faster way to move files between devices than using external drives. At its most basic, a NAS hub is a central file storage unit that connects to your computer devices in your home via a local network. ![]()
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