I have an iPhone 16 Pro 256gb currently running iOS 18.2.1 that will not recognise my external SSD but when I plug in the SSD to an iPad Pro (11ich) running 18.2 it shows up and works perfectly.
The SSD is in a TB4/USB4 compatible enclosure and is formatted to APFS (case-sensitive).
Why would it show up on the iPad and not the iPhone? What am I missing?
iPhone 16 Pro, iOS 18
An external storage device must have only a single data partition, and it must be formatted as APFS, APFS (encrypted), macOS Extended (HFS+), exFAT (FAT64), FAT32, or FAT. To change the formatting of a storage device, use a Mac or PC.
You can use the Files app and other supported apps to access files stored on external devices, such as USB drives and SD cards, connected to your iPhone.
Connect external storage devices to iPhone
External SSD not appearing on iPhone 16 Pro
