I just downloaded the Memory Zone app for my Acer Iconia A500 Android Honeycomb 3.2 10" tablet.
The A500 has a full size USB connector which I can plug a memory stick into. But your Memory Zone app does not "see" the files on my memory stick. Other applications such as "Docs to Go" see this device as \USB\. in their Local Files.
It would make the MemoryZone muchmore useful if it could access the USB Port.