Moving Files Between Phones, Tablets and Drives Without a Computer

Phones and tablets can read and write external drives directly. The obstacles are connectors, file systems and power — and once you know which one you are hitting, the fix is usually straightforward.

What you need to check first

The connector. USB-C on most current phones and tablets, Lightning on older iPhones and iPads. The drive is usually USB-A, so you need an adapter or a drive with the right connector.

Power. A phone or tablet supplies limited power over its port. A USB stick is fine. A portable hard drive with spinning platters frequently is not, and you will see the drive appear and then disconnect.

The fix for power: a powered adapter — one with its own power input — or a drive that is self-powered. A powered USB hub between the two also works.

The file system. Devices read some formats and not others.

• exFAT — read and written by nearly everything. The format to use for a drive you move between devices.
• FAT32 — universally readable, and files above 4 GB cannot be stored. A problem for video.
• NTFS — Windows format. Android and iOS generally read it and cannot write to it.
• APFS and HFS+ — Apple formats. Not readable by Android or most other devices.

If a drive is not recognised, the file system is the most likely reason. Reformatting to exFAT solves most cases, and it erases the drive.

Phone or tablet to a USB drive

On iPhone and iPad: connect the drive with the appropriate adapter. It appears in the Files app under Locations. Photos and video are moved by selecting them in Photos, choosing to save or export to Files, then to the drive.

Note the export choice. Exporting as-is preserves the original file; exporting a copy may convert to a different format. For video this matters.

On Android: connect with a USB-C adapter or an OTG cable. The drive appears in the Files app. Copy and paste as with any folder.

If nothing appears: check the file system, then power. Those two account for nearly all failures.

USB drive to a phone or tablet

Same connection, opposite direction.

On iPhone and iPad: open Files, browse the drive, and copy into On My iPhone or a cloud folder. Music copied this way lives in Files rather than in the music app — playing it means opening it from Files, or importing through an app that supports it.

This is the limitation people meet: you can store music on an iPhone from a drive, and getting it into the music library is a separate step that depends on how the library is set up.

On Android: copy into internal storage, and most music and video apps will find it automatically after a media scan.

Playing directly from an external drive

Both platforms can play from a connected drive without copying first, using the Files app or a media player that browses storage.

Practical caveats: the drive must stay connected, it consumes battery, and large video files may stutter over a slow connection.

For music specifically, a player app that supports external storage handles this better than the built-in music apps, which expect files in their own library.

Between two devices without any drive

Frequently easier than either of the above.

AirDrop between Apple devices — fast, direct, no network needed.

Quick Share or Nearby Share on Android, and equivalents between Android and Windows.

Cloud storage — upload from one, download on the other. Slower, needs a connection, and it works between anything.

A shared network drive, if you have one at home.

Direct cable between two phones, with a USB-C to USB-C cable, which works on many Android devices.

For a one-off transfer of a few files, cloud or direct sharing is quicker than finding an adapter.

Wireless drives and card readers

Wireless drives create their own Wi-Fi network and are browsed through an app. No adapters, no power problems, and they are slower and need charging.

SD card readers with a phone connector are useful for camera cards specifically, and this is the most common reason people want this capability at all.

Common problems

Drive appears then disconnects — power. Use a powered adapter.

Drive not recognised at all — file system. Reformat to exFAT, after copying anything on it elsewhere.

Files copy but will not open — format not supported by the app. A different player usually solves it.

Very slow transfer — the drive, the adapter, or the connection standard. Older adapters cap the speed regardless of what the drive can do.

Large video file will not copy — FAT32's 4 GB limit. Reformat to exFAT.

Photos exported in the wrong format — check the export option rather than the default.

iPhone shows the drive but folders are empty — occasionally a permissions or format issue; disconnecting and reconnecting resolves some cases.

Practical advice

Use exFAT for any drive you move between devices. It removes the file system problem entirely.

Get one good adapter with its own power input, rather than several cheap ones.

Test with a small file first before moving something irreplaceable.

And keep a second copy. Moving files means there is a period when there is only one, and that is when things go wrong. See backing up your data.

The short version

Three things stop this working: the connector, the power, and the file system. Identify which and the fix is simple.

Use exFAT for any drive that moves between devices.

A powered adapter solves the drive that appears then disappears — a phone cannot supply enough power for a mechanical drive.

FAT32 cannot hold a file above 4 GB, which is why video transfers fail.

And for a handful of files between two devices, direct sharing or cloud is faster than finding the right adapter.

For current device-specific setup and troubleshooting details, see Apple Support.