[simonsullivan1]

Probably not the type of cable question you're used to.....
 
......but I'm trying to find out if there is such a thing as; a standard Type A USB connection on one end and a micro B USB on the other (for use with a portable HDD), but the cable needs to have another standard Type A USB that is then plugged into a power source.  The desired result is that both the DX50 and the external portable HDD are charged/powered.
 
I'm hoping that a cable exists that can achieve this....... any ideas

 

[Oklahoma]

Yes and no. There is a cable with 2 A ends and a mini B end that many portable dvd drives use for netbooks. I would try finding one of those and then getting a mini B to micro B adapter for it. So not one specific cable but should solve your issue.

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[Oklahoma]

Would look like this.

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[simonsullivan1]

Thanks for your input Oklahoma, I was actually recommended this cable 
http://www.ebay.co.uk/itm/380680038309?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
 
by chance on a different thread, I've not received it yet but will give an update when I do.....