BRAW 18:1 storage requirements
One hour of BRAW 18:1 in UHD at 25p takes 61 GB. The table below runs the numbers for every common resolution and frame rate — including how many cards and how much backup volume a shoot day actually needs.
Footage Storage Calculator
- Footage per day
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- With all copies
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- Cards needed
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- Offload time (1 copy)
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Data rates: ProRes/DNxHR are per-frame constants from the Apple/Avid specs; RAW derives from resolution × bytes/pixel (nominal). Details further down this page.
BRAW 18:1: GB per hour
BRAW 18:1 is a RAW format: data volume follows from resolution × 0.0833 bytes per pixel per frame (nominal, derived from the manufacturer spec) × frame rate. Content-adaptive compression can land slightly below — you budget the nominal value, because the card has to survive the busiest take.
| Resolution | 24p | 25p | 30p | 50p | 60p |
|---|---|---|---|---|---|
| HD 1920×1080 | 15 | 15 | 18 | 30 | 36 |
| UHD 3840×2160 | 58 | 61 | 73 | 121 | 146 |
| 4K DCI 4096×2160 | 62 | 65 | 78 | 130 | 155 |
| 6K 6144×3240 | 140 | 146 | 175 | 291 | 350 |
| 8K 8192×4320 | 249 | 259 | 311 | 518 | 622 |
From GB to a shoot day
A typical shoot day produces 2–4 hours of footage per camera. At BRAW 18:1 in UHD 25p that is 121–243 GB per camera — before copies. With 3-2-1 backup (three copies) it multiplies to 0.5 TB per three hours of material. The table runs three full shoot-day scenarios:
| Footage | Raw data | 1 TB cards | 3-2-1 volume | Offload per copy (400 MB/s) |
|---|---|---|---|---|
| 2 h | 121 GB | 1 | 0.36 TB | 5 min |
| 4 h | 243 GB | 1 | 0.71 TB | 10 min |
| 8 h | 486 GB | 1 | 1.42 TB | 21 min |
Planning offload and backup
Offload is the underrated line: securing a 1 TB card over a 400 MB/s link takes about 42 minutes per copy. Book the DIT only for wrap and you have booked a night shift.
In the schedule this number belongs in two places: as a card budget on the equipment list and as an offload window in the day plan. TillyGen keeps both in the same plan — change the shooting hours and the offload window moves with them.
Frequently asked
How much storage does 1 hour of BRAW 18:1 need?
In UHD at 25p: 61 GB. At 50p, double that. Every resolution is in the table above.
Are the numbers exact?
RAW rates are manufacturer nominal values; content-adaptive compression can land slightly below. For capacity planning, use the nominal value plus 10 % headroom.