This looks interesting:
SanDisk 64GB Connect Wireless Stick Flash Drive - Wi-Fi, USB 2.0 - SDWS4-064G-G46 https://www.amazon.com/dp/B00ZCFYF2W/ref=cm_sw_r_cp_api_i_d1cdCb3CA9B0G
Found another type, the XPand that plugs in the lighting port and DOES have an SDK to access the files.
Now all I need is some free time. Oh wait...
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