do they have any "wireless" USB adapters?

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http://forum.xda-developers.com – For devices that don't have support for USB [OTG or full size] and charging at the same time [Example, Nexus 7], do they have any devices, perhaps bluetooth, or maybe wifi, that you plug in your existing USB hard drive, and you can mount it on your tablet [via bluetooth or wireless], and stream the files like that? The main purpose would be so you can charge the tablet and access a large hard drive, perhaps for videos, or whatever. Does anybody make anything like this for Android? And please do not suggest a "wifi HDD," thanks. (HowTos)