As part of Prime Day, Amazon has the Sandisk Ultra 128 GB OTG USB 3.0/Micro USB flash drive, model SDDD3-128G-G46 for $26 shipped — Android only (thanks Steeve):
https://www.amazon.com/dp/B01M0QR22B
B&H Photo has it for same price shipped, ends at midnight eastern 7/11:
https://www.bhphotovide
Adorama has it for same price shipped, also ends midnight 7/11:
https://www.adorama.com/idsdudd12…ire