Send Files from iPhone: Large File Transfer for iOS

To send a large file from your iPhone, upload it in Safari to a browser-based transfer service like HexaTransfer (10 GB free, end-to-end encrypted). iMessage caps around 100 MB and compresses video. Mail Drop handles up to 5 GB via iCloud but only for Apple Mail recipients. AirDrop works for nearby Apple devices with no size limit in practice. For everything else — sending a 4K video to a friend on Android, a ProRes master to a client, a folder of RAWs to a photographer — a browser-based service beats every native option.

iPhone-specific file-size reality

A minute of 4K HDR ProRes from an iPhone 16 Pro is about 6 GB. Cinematic mode 4K HDR is about 1 GB per minute. A Live Photo is 3-5 MB. A RAW photo from an iPhone 15 Pro or newer (.DNG) is 20-30 MB. Modern iPhones generate very large files very quickly — a 10-minute ProRes recording produces a 60 GB file that no free tier handles.

For everyday media (HEIC photos, standard video), a single transfer is usually 50 MB to 2 GB.

The five paths off an iPhone

| Path | Works with | Max size | Quality impact | |---|---|---|---| | Safari + HexaTransfer | Anyone (web link) | 10 GB | None | | AirDrop | Nearby Apple devices | No practical limit | None | | iMessage | iMessage/SMS users | 100 MB native | Compresses video | | Mail Drop | Any email recipient | 5 GB | None but 30-day expiry | | WhatsApp/Signal/Telegram | Users on those apps | 2 GB / 100 MB / 2 GB | Compresses media | | Google Drive / Dropbox app | Recipients of the link | 15 GB / 2 GB (free) | None |

Step by step: upload from iPhone

1. Open Safari. Go to hexatransfer.com.
2. Tap "Upload files".
3. iOS shows a picker with options: Photo Library, Choose Files (Files app), Take Photo, or Scan Documents.
4. Select files. Multi-select is supported in Photos since iOS 14 and in Files for years.
5. Confirm. Upload begins in Safari.
6. When the link appears, tap the share icon and send via Messages, Mail, or Signal.

Keep Safari visible while uploading. Backgrounding Safari for a long time will eventually suspend the upload — iOS's background task allowance is roughly 30 seconds for generic background work, though media upload tasks can sometimes get more.

Mail Drop: Apple's own large-file trick

Apple Mail offers "Mail Drop" for attachments above 20 MB. It uploads to iCloud and sends a link. Free for users. Catches:

• Recipients using Apple Mail see inline attachments. Others see a "Click to download" link.
• Files expire after 30 days.
• 5 GB per attachment, 1 TB total across pending Mail Drop transfers.
• TLS in transit, stored on iCloud (Apple-managed keys — not end-to-end encrypted).

Good for casual sharing. Not appropriate for sensitive material, since Apple can technically access the attachments.

AirDrop vs transfer services

AirDrop is the right tool when:

• Recipient is physically close.
• Both devices are Apple.
• File integrity and speed matter (often 40-80 MB/s via Wi-Fi Direct).

AirDrop breaks when:

• Recipient isn't nearby.
• Recipient is on Android or Windows (there's no AirDrop for them, despite various "AirDrop for PC" knock-offs).
• You want a shareable link instead of a direct push.

A browser-based transfer service covers both of those gaps with a URL that works on any device.

HEIC, HEVC, and recipient compatibility

iPhone photos are HEIC, iPhone videos are HEVC. Recipients on old Windows, older Android, and some web apps may not open them. Two options:

Change the capture format: Settings > Camera > Formats > "Most Compatible". Going forward, photos save as JPEG and videos as H.264. File sizes roughly double but compatibility issues disappear.

Convert on transfer: Settings > Photos > "Transfer to Mac or PC" > Automatic. When you AirDrop or USB-transfer to a non-Apple destination, iOS converts to JPEG/H.264. Note this doesn't apply to transfers through Safari upload — those keep the original format.

For external clients, "Most Compatible" from the start avoids pain.

iCloud Drive and the Files app

The Files app is the central hub for document-style files on iOS. It supports iCloud Drive, Google Drive, Dropbox, OneDrive, and any provider that implements the FileProvider extension. When uploading from Safari, the "Browse" option opens Files, so anything accessible there is uploadable.

If you have a PDF in Dropbox that you want to send via HexaTransfer: open Safari > hexatransfer.com > Upload > Browse > tap "Dropbox" in Locations > select file. No double-download required; iOS streams it from Dropbox into the Safari upload.

Battery, heat, and data usage

Long uploads drain battery and heat up the phone. A 5 GB upload on Wi-Fi takes 3-10 minutes and uses 5-15% of battery. On 5G cellular, it costs 5 GB of monthly data allowance, and thermal throttling can cut upload speeds on a hot phone by 30-50%. Plug in while uploading anything over 1 GB.

Low Power Mode slows uploads because it deprioritises background and network tasks. If you're racing to send something before a meeting, turn it off for the duration.

Shortcuts automation

iOS Shortcuts can automate transfer flows. A "Send to Client" shortcut could:

1. Pick a file from Photos or Files.
2. POST to the transfer service API (if it offers one) or open the service URL with the file pre-selected via Share Sheet.
3. Copy the resulting link to clipboard.
4. Open Messages with the link pre-filled to a specific contact.

Few transfer services offer a public API for programmatic uploads; the Share Sheet route works for most.

Privacy-conscious defaults

For iPhone users who care about privacy:

• Strip location from photos before sharing: Share sheet > Options > Location Off (iOS 15+).
• Use private browsing in Safari for sensitive uploads.
• Choose E2E-encrypted transfer services so iCloud/service providers can't read content.
• Delete the source file after transfer if you don't need it locally.

Try it at hexatransfer.com — open in Safari, upload from Photos or Files, share the link, 10 GB free, end-to-end encrypted.