DB Labs
Quick Answer
iPhone 15 and later (USB-C) can connect directly to any USB-C flash drive. Plug it in — the drive appears in the Files app under Locations. Then open Photos, select photos, tap Share → Save to Files → choose the USB drive. On older iPhones (Lightning), you need an Apple Lightning to USB 3 Camera Adapter ($39) to connect a standard USB drive, or a dual Lightning/USB flash drive like the SanDisk iXpand. All transfers preserve full original quality with no compression.
iPhone 15 and Later: Direct USB-C Transfer
Starting with iPhone 15, Apple switched from Lightning to USB-C. This makes direct USB storage much simpler — any USB-C flash drive plugs straight in.
1 Get a USB-C Flash Drive
Purchase a USB-C flash drive. Recommended options: SanDisk Ultra Dual Drive Go (USB-C + USB-A, $15-25), Samsung MUF-128DB (compact USB-C, $20-30), or Kingston DataTraveler 80 (USB-C, $15-20). Get at least 128 GB for a full photo library backup.
2 Plug In the Drive
Connect the USB-C flash drive to your iPhone 15 or later. A notification may appear — dismiss it. Open the Files app. Under Locations, you will see your flash drive listed by name.
3 Copy Photos to the Drive
Open the Photos app, select the photos you want to copy, tap the Share button, scroll down, and tap Save to Files. Navigate to your USB drive under Locations and tap Save. Photos transfer at full original quality in HEIC format.
4 Verify and Eject
Open Files → your USB drive to confirm photos transferred. To safely disconnect, close Files and any app using the drive before unplugging. Unlike computers, iOS does not require a formal "eject" step — closing Files is sufficient.
Older iPhones (Lightning): How to Connect USB
iPhones with Lightning connectors (iPhone 14 and earlier) require an adapter or a specially designed Lightning flash drive:
Option A: Apple Lightning to USB 3 Camera Adapter
The Apple Lightning to USB 3 Camera Adapter (about $39 at Apple retail) converts the Lightning port to a USB-A port. Connect any standard USB-A flash drive to this adapter, plug the adapter into your iPhone, and the drive appears in the Files app. Note: this adapter also supports charging via the Lightning port on the adapter itself, so you can power your iPhone during large transfers.
Option B: Lightning Flash Drive
Several manufacturers make flash drives with a Lightning connector on one end and USB-A on the other. The SanDisk iXpand Flash Drive is the most popular — it has a built-in Lightning connector that plugs directly into your iPhone and a USB-A connector for your computer. It comes with its own app that can automatically back up your camera roll.
USB Drive Format Compatibility
| Format | iPhone Compatible | Mac Compatible | Windows Compatible | Max File Size |
|---|---|---|---|---|
| FAT32 | Yes | Yes | Yes | 4 GB per file |
| exFAT | Yes | Yes | Yes | No limit |
| APFS | Yes | Yes | No | No limit |
| NTFS | Read only | Read only | Yes | No limit |
External Hard Drives with iPhone
The same method works with external hard drives (SSDs and HDDs) on iPhone 15 and later via USB-C. Bus-powered (no external power) portable SSDs work best — they draw power from the iPhone's USB-C port. Large spinning HDDs may require too much power and won't be recognized. The WD My Passport SSD and Samsung T7 Shield are popular choices that work reliably with iPhone 15.
For a complete guide to all backup options, see our article on best photo backup solutions for iPhone and our how-to guide on moving iPhone photos to an external hard drive.