The Best Memory Cards for Fujifilm's GFX Eterna 55
The Eterna 55 only records ProRes to CFexpress Type B cards, no SD workaround. Here's exactly what to buy by codec and bitrate.
The Eterna 55 records to two very different card types depending entirely on what codec you're shooting, and Fujifilm's own specs make one requirement explicit: Apple ProRes recording only works on a CFexpress Type B card. There's no SD workaround for that format at all.
Two Slots, Two Very Different Jobs
The camera has dual card slots: one for CFexpress Type B (capacities up to 2TB), one for SD/SDHC/SDXC in UHS-II or UHS-I speed classes (also up to 2TB). An external SSD is supported too, up to 2TB over USB-C, though Fujifilm's own compatibility notes flag that external SSD recording doesn't work in ProRes HQ mode specifically.
Why ProRes Forces the CFexpress Slot
Fujifilm's specifications state plainly that the Apple ProRes codec can only be recorded to a CFexpress Type B card, and the bitrate for ProRes isn't even selectable, it's fixed. If you're shooting in ProRes 422 or 422 HQ at all, an SD card genuinely isn't an option, full stop.
What SD Cards Actually Handle
For non-ProRes recording, Fujifilm ties card requirements directly to bitrate. Shooting at 720 Mbps requires either a CFexpress Type B card or an SDXC/SDHC card rated V90 or higher.
Drop to 360 Mbps, and a V60-rated SD card becomes sufficient. Lower bitrates around 100–200 Mbps can run on CFexpress or SD cards meeting UHS Speed Class 3 (U3) or better.
Fujifilm also recommends CFexpress Type B or UHS-II SDXC cards generally, specifically to avoid video files getting split into 4GB chunks during long takes, a real practical annoyance during editorial ingest if you're using a slower card class.
What to Actually Buy
For anyone planning to shoot ProRes at all, a high-capacity CFexpress Type B card is not optional, it's the only path to that codec.
The OWC Atlas Ultra CFexpress 4.0 Type B is a leading option here: independent testing measured a real-world sustained write speed of 1,500 MB/s, far beyond what this camera actually needs, and it's one of the few CFexpress cards to meet RED Digital Cinema's own approval standard for the V-Raptor, a solid proxy for reliability under sustained cinema workloads. For a lower-cost option that still comfortably clears the camera's top 720 Mbps bitrate, the OWC Atlas Core CFexpress Type B delivers 368 MB/s sustained write for meaningfully less money.
For SD-based recording at lower bitrates, or as a second-slot backup, a V90-rated UHS-II SDXC card covers the camera's higher non-ProRes bitrates, while a V60 card is sufficient once you're shooting at or below 360 Mbps.
Competitive Context
This CFexpress-only ProRes restriction isn't unusual for cameras targeting this level of production, several cinema cameras gate their highest-quality internal codecs behind faster media specifically to guarantee sustained write performance. What's worth remembering here is that it's not a suggestion or a "recommended" note, it's a hard technical requirement built into the camera's firmware.
The Signal in the Noise
Given ProRes recording is the format most productions will actually want from a camera at this price point, budgeting for CFexpress Type B media isn't really optional planning, it's a baseline cost of ownership alongside the camera and lenses. Treating it as an afterthought is the kind of mistake that shows up expensive and inconvenient mid-shoot rather than during pre-production.
Does a hard codec-to-card restriction like this change how you'd budget for a camera at this price point, or is it just an expected cost of working at this level?
Specs & Pricing
- Card slots: CFexpress Type B (up to 2TB) + SD/SDHC/SDXC UHS-II/UHS-I (up to 2TB)
- ProRes codec: CFexpress Type B only, no SD card option, bitrate not selectable
- 720 Mbps recording: CFexpress Type B or SDXC/SDHC V90+
- 360 Mbps recording: CFexpress Type B or SDXC/SDHC V60+
- 100–200 Mbps recording: CFexpress Type B or SDXC/SDHC UHS Speed Class 3 (U3)+
- External SSD: supported up to 2TB via USB-C, not compatible with ProRes HQ mode
- Recommended: check Fujifilm's official validated card list for confirmed-compatible CFexpress Type B and UHS-II SD cards
