XAVC-I (Class 300) storage requirements
One hour of XAVC-I (Class 300) in UHD at 25p takes 110 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.
XAVC-I (Class 300): GB per hour
XAVC-I (Class 300) is per-frame constant (1.25 MB per UHD frame per the spec) — the data rate scales linearly with frame rate and pixel count. That is why 50p is exactly twice 25p, and 8K four times UHD.
| Resolution | 24p | 25p | 30p | 50p | 60p |
|---|---|---|---|---|---|
| HD 1920×1080 | 26 | 27 | 33 | 55 | 66 |
| UHD 3840×2160 | 105 | 110 | 132 | 220 | 264 |
| 4K DCI 4096×2160 | 113 | 117 | 141 | 234 | 281 |
| 6K 6144×3240 | 253 | 264 | 316 | 527 | 633 |
| 8K 8192×4320 | 450 | 469 | 563 | 937 | 1,125 |
From GB to a shoot day
A typical shoot day produces 2–4 hours of footage per camera. At XAVC-I (Class 300) in UHD 25p that is 220–439 GB per camera — before copies. With 3-2-1 backup (three copies) it multiplies to 1.0 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 | 220 GB | 1 | 0.64 TB | 9 min |
| 4 h | 439 GB | 1 | 1.29 TB | 19 min |
| 8 h | 879 GB | 1 | 2.57 TB | 38 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 XAVC-I (Class 300) need?
In UHD at 25p: 110 GB. At 50p, double that. Every resolution is in the table above.
Are the numbers exact?
ProRes/DNxHR are specified target rates; real files land within a few percent. For capacity planning, use the nominal value plus 10 % headroom.