I have many IOS devices. I still use most of them. If I'm outside doing work or something that's risky of physical damage, I don't usually use my main phone so I have several older ones I use as a just in case. I have ipads going to back to ipad 2. I want to be able to access data on those with less storage, via thumb drives. I've tried many drives but they all require 3rd party apps. I"ve seen this question on several forums but have yet to find a good ACCURATE answer. I have adapters so I can go from lightning to USB-C, USB/Lightning, etc... so the physical connection isn't as important. Of course since most of my older devices are lightning, having a lightning i/f would be good but again, if it's 10x the cost of the same storage w. standard USB i/f, I'll go with the $50 vs $500. Again, just to clarify, thumb drive that will work in different IOS versions, from the newest back to ios 12, just a standard thumb drive that does not require add'l apps to see files on it. NOTE: Please do not do what I've seen on several forums, recommend a $30 1TB drive from scam vendors. Thanks in advance.