Is a USB 3.0 disk a good backup disk?
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USB 3.0 is in most real world cases not faster than USB 2.0. And a bad WiFi connection can be caused by a USB 3.0 equipment. Read here what you need to know before you buy.
Does a disk with USB 3.0 give you faster backup than USB 2.0?
Some people, when they buy an external hard disk for their backup, prefer USB 3.0 (socalled SuperSpeed) over USB 2.0. It's much faster innit?
Well in many cases its not at all faster, the internal chipsets in your computer can't yet handle USB 3.0 speed, or your operating system does not (yet) support it (even Win 7 requires extra drivers).
A bit like buying a Ferrari but living in a world which is one giant 30 mph zone. It looks faster but doesn't actually go any faster.
Additional trouble can flare up for your WiFi connection. The very high speed (i.e. frequencies) lead to electric noise emitted by the USB 3.0 plug, socket and cables. So much that your WiFi can be badly disturbed. And whllst were at it your Bluetooth for your mouse and keyboard equally affected as they work in the same radio band.
The closer your Wifi aerials are to any USB 3.0 equipment the worse the problem gets. Tricky for some laptops where you can't move it as much or as easy as for desktop PCs.
What do we learn? Don't fall for marketing hype, ask your knowledgeable IT person before you buy.
(Technical paper available for colleagues from the IT industry or interested geeks. Pls PM)