I am looking for a way to copy files from my camera's SD card to a portable hard drive as I do at the moment with my netbook computer. The "Walled Garden" that is iOS seems to make this quite a challenge.
For the SD card the choices seem to be the Camera Connection Kit or AirStash. One ties up the physical port on the iPad and one doesn't. The choice made here affects the options forth portable HDD.
For the HDD, one choice is the HyperDrive which requires the use of the physical port and is quite expensive. I have looked for a suitable wireless (or even Bluetooth) HDD but haven't found one yet.
Generally, wireless seems to but the best way to circumvent the physical connection limitations of the iPad, so wireless (AirStash) to wireless is another possibility.
Of course a hardware solution only gets us halfway. The other half is an App that acts like the file manager that iOS doesn't have. FileBrowser is the nearest App the I can think of but I don't know whether it would do the job in this case, there is a good chance that would I think.