The i-FlashDevice HD may be a nice solution. The i-FlashDevice HD is a built-in memory styled USB flash drive that works with all Lightning-enabled iOS devices, including Apple’s latest iPhone...
Premium Quality Portable 4 in 1 Micro SD Card Readers, Mobile phone USB flash drive USB 3.0 TF Flash Memory USB, Lightning, Micro Usb, Type C Usb Connector Otg, iPhone/ios/android,...