How can I mount a thumbdrive to my iPhone? I have a jailbroken iPhone 6s running iOS 10.3.3. I'd like to be able to connect a r/w thumbdrive to my phone, but I don't know what kind of adapter I'd have to buy/make. Does anyone have any suggestions how to do this?

I'll likely be able to mount it in a terminal GUI (NewTerm2 in this case) using fdisk and then mount, but if needed I can install other commands.

Lightning&lt;-->USB (a)
SanDisk already make the iXpand thumbdrive series from small to damned big, which have USB 2-3 and lightning connectors on them from the manufacturer.

I use one routinely without issue.