DB LabsQuick Answer
An iPhone is a capable second body at a wedding, but ProRAW and ProRes fill it fast — roughly 75 MB per ProRAW frame and 6 GB per minute of 4K ProRes. The workable setup is a Pro model with 512 GB or more, ProRAW toggled per shot rather than left on, ProRes recorded straight to an external SSD over USB-C, and a card-by-card offload between ceremony and reception.
Budgeting Storage for a Full Day
Wedding coverage runs eight to twelve hours with no realistic opportunity to stop and clear space. Plan the capacity in advance.
- HEIC at 48MP — about 5 MB per frame. A thousand frames is 5 GB.
- ProRAW at 48MP — 75 MB or more per frame. A thousand frames is 75 GB.
- 4K/60 HEVC video — about 400 MB per minute.
- 4K ProRes — about 6 GB per minute. Ten minutes is 60 GB.
Shooting ProRAW throughout a full day will exhaust a 256 GB phone before the speeches. This is the main argument for 512 GB or 1 TB on a Pro if the iPhone is doing real work rather than backup duty.
Use ProRAW Selectively
Leaving ProRAW on for the whole day is the most common mistake. Enable it under Settings → Camera → Formats, then use the RAW toggle in the Camera app per shot.
ProRAW earns its size where you will need latitude in the edit: the ceremony under mixed tungsten and daylight, backlit portraits, a dim reception room. For candid coverage, guest reactions, and detail shots, 48MP HEIC holds up and costs a fifteenth of the space.
Record ProRes to an External Drive
On iPhone 15 Pro and later, ProRes can record directly to a USB-C SSD, which sidesteps the internal storage question entirely. Connect the drive before you start recording and the Camera app writes straight to it.
Use a drive rated for sustained write speeds, not a cheap flash stick. ProRes 4K needs consistent throughput and a slow drive will drop frames mid-take. Check the drive is formatted exFAT or APFS.
On older Pro models without USB-C, ProRes is capped at 1080p on the 128 GB variant and consumes internal storage regardless. Our connector comparison covers what each generation supports.
Offloading Between Segments
Weddings have natural gaps — after the ceremony, during the meal — and those are your offload windows.
- Connect a USB-C SSD and open Files to confirm it mounts.
- In Photos, select the segment you just shot and use Share → Save to Files.
- Work in batches of a few hundred. Selecting thousands at once stalls the share sheet.
- Verify the count on the drive before deleting anything from the phone.
- Only then delete the offloaded batch and empty Recently Deleted to reclaim the space.
Never delete originals on the strength of a transfer you have not checked. Wedding files are unrepeatable.
Redundancy on the Day
One copy is not a backup, and a wedding is exactly the situation where that matters. Aim for two copies before you leave the venue: the phone plus an external drive, or the phone plus a completed iCloud upload.
Turn off Optimize iPhone Storage while shooting. You want full-resolution originals on the device, not lightweight versions that depend on a download. Turn it back on afterwards.
Once the files are safely in your editing workflow with two copies, clear the phone properly. Swype Photo Cleaner handles the rejects fast, and our redundancy guide covers longer-term archiving.
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