On Monday, September 5, 2016 at 2:22:22 PM UTC-4, Andy Blackburn wrote:
On Monday, September 5, 2016 at 4:47:13 AM UTC-7, Dave Nadler wrote:
... Anyway, the HooToo gadget works great and is inexpensive.
... If any one else has another TESTED SOLUTION it would be great to hear.

I may have missed something but it seems like many of these devices
will only transfer specific (mostly photo and video) file types.

That is correct. The HooToo's iPlugmate app:
- is keyed to the HooToo-specific USB DeviceID
- allows selecting any file on the external storage and emailing it.

Does anyone have experience using either a WiFI SD card or USB
stick to email IGC files?

Again, you need a USB stick keyed to an app that can do this.
As I understand, no generic solution (for arbitrary DeviceID
supporting class MSD) is possible.

Snagging the IGC file as an attachment off a USB or SD WiFi
device directly from within the iPhone mail app I think
requires getting Apple to approve transfer of the IGC file
type (or some hack making an IGC file look like a photo or
video file).

That is my understanding. You may also need to contend with
power limitations and other gotchas ;-) I couldn't get the
Apple 'import' function to do anything, even with 'known'
file types like JPG.

I'd be very happy to be proven wrong about the restrictions
or shown a good workaround.

Yup. If anyone has any additional TESTED, NON-HYPOTHETICAL,
ACTUALLY WORK IN REAL WORLD solutions, please let us know.

Meanwhile, I'll use the TESTED, ACTUALLY WORKS HooToo.

See ya, Dave