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<blockquote data-quote="§am" data-source="post: 105067" data-attributes="member: 9187">Any USB powered drive (generally only 2.5&quot; or smaller) can be powered by the 500mA of a USB2 port.&nbsp; One port can allow up to 127 devices to be daisy chained to it (however, worth noting that a physical port may actually be part of a logical port, and only 127 devices in total can be linked to a logical USB port (assuming you're not exceeding the power output of each physical port!!)&nbsp; Larger 'desktop drives (3.5&quot; drives) need a 12V connection and are always powered externally.Network attached drives/storage (also known as NAS) is a whole different ball game, as you then have a specific enclosure designed to hold one or more drives and made available via your home network.A variant of a NAS is a DAS (Direct Attached Storage).&nbsp; It's simply an external hard drive box which allows one or more drives to be connected direct to your computer (much like a NAS, just using a USB or eSATA connection).</blockquote>

[QUOTE="§am, post: 105067, member: 9187"] Any USB powered drive (generally only 2.5" or smaller) can be powered by the 500mA of a USB2 port. One port can allow up to 127 devices to be daisy chained to it (however, worth noting that a physical port may actually be part of a logical port, and only 127 devices in total can be linked to a logical USB port (assuming you're not exceeding the power output of each physical port!!) Larger 'desktop drives (3.5" drives) need a 12V connection and are always powered externally. Network attached drives/storage (also known as NAS) is a whole different ball game, as you then have a specific enclosure designed to hold one or more drives and made available via your home network. A variant of a NAS is a DAS (Direct Attached Storage). It's simply an external hard drive box which allows one or more drives to be connected direct to your computer (much like a NAS, just using a USB or eSATA connection). [/QUOTE]

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