CFexpress Type A vs SD for Sony FX30: Start With the Recording Mode
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Research basis: This comparison uses Sony's recording guidance and Angelbird's published specifications. It does not include SwoleNerd Productions hands-on testing or measured card performance.
The best memory-card choice for a Sony FX30 starts with the recording mode, not the largest speed number on a product page. The FX30 supports both SD cards and CFexpress Type A cards, but Sony's requirements change with the file format, movie or S&Q mode, frame rate, bit rate, and proxy setting.
That means neither format wins every time. A qualified SD card can cover many normal recording setups. CFexpress Type A becomes important when a specific mode requires it or when you intentionally want a Type A workflow.
The short answer
Use Sony's current media table for the exact settings you plan to record.
Do not buy CFexpress Type B for the FX30. The camera uses Type A, not Type B.
Many ordinary movie settings can use a properly rated SD card.
Some high-frame-rate S&Q combinations require CFexpress Type A media rated for Sony's stated requirement.
A card's advertised peak read speed does not prove compatibility with every camera mode.
Write down the recording setup first
Before comparing products, identify these six details:
File format, such as XAVC HS 4K, XAVC S 4K, or XAVC S-I.
Movie mode or S&Q mode.
Capture frame rate.
Recording setting and bit rate.
Whether proxy recording will be enabled.
The camera firmware version when a format has a firmware requirement.
Those details place your setup in a specific row of Sony's compatibility guide. Shopping from the row is safer than assuming every card with a large number on the label is suitable.
Where SD remains a practical option
Sony's guide allows SD media for many FX30 recording combinations. The required SD rating depends on the mode.
Several XAVC HS 4K and XAVC S 4K movie settings call for V60 SDXC media.
XAVC S-I 4K, XAVC S-I HD, and DCI recording commonly move the SD requirement to V90.
Some lower-bit-rate settings can use less demanding SD ratings under Sony's stated conditions.
S&Q settings can raise the SD requirement even when a related normal movie setting accepts a slower card.
The practical advantage is simple: if your existing SD card meets the exact Sony requirement for your chosen setting, changing formats may not solve a real production problem. Confirm the rating on the card itself and test the full recording setup before paid work.
When CFexpress Type A becomes necessary
The important exceptions appear in S&Q recording. Sony specifies CFexpress Type A media rated VPG200 or higher for certain high-frame-rate combinations, including some slow-motion settings that an SD card cannot cover under the published table.
Examples include selected XAVC S-I 4K or DCI slow-motion settings and the highest XAVC S-I HD S&Q frame rates. The exact requirement depends on the row and footnote, so avoid the blanket claim that all 4K or all slow motion requires CFexpress.
Sony also notes that proxy recording can affect the required media. If proxies are part of the workflow, include that option when checking the table.
Type A and Type B are not interchangeable
CFexpress Type A and Type B are different physical formats. The Sony FX30 accepts Type A cards in its dual media slots. A Type B card will not fit and should not be treated as a faster substitute.
This is one of the easiest mistakes to prevent: confirm that both the card and reader say CFexpress Type A before ordering.
What the Angelbird 1TB option adds
The exact storefront item is the Angelbird AV PRO CFexpress A v4 1TB, manufacturer model AVP1T0CFXAMK2. Angelbird lists this model as compatible with the Sony FX30 and describes it as a CFexpress v4 Type A card that is backward compatible with CFexpress 2.0 devices.
Angelbird publishes maximum read and write figures and separate sustained figures for this model. Those are manufacturer specifications based on Angelbird's test conditions, not results measured by SwoleNerd Productions. They should not be converted into a promise of camera performance, offload speed, or picture quality.
One important check remains: the official Angelbird product page inspected for this guide did not state the VPG certification number shown on the retail listing. If your selected Sony mode specifically requires VPG200 or higher, confirm the certification on current manufacturer documentation or the exact card packaging before ordering.
Prices and availability can change. Amazon controls the final price shown at checkout.
Do not confuse card speed with better image quality
A faster card does not improve the image produced by a recording mode. Its job is to meet the camera's write requirements reliably enough for that selected setting.
Choose media for compatibility first. Capacity, offload speed, reader support, and cost come next. A large Type A card can be convenient, but it can also concentrate more footage on one piece of media. Your card rotation and backup plan still matter.
A practical buying checklist
Format: CFexpress Type A or the exact SD type the camera accepts.
Recording row: file format, movie or S&Q mode, frame rate, and bit rate.
Required rating: V60, V90, VPG200 or another rating stated by Sony for that row.
Proxy setting: whether simultaneous proxy recording changes the requirement.
Exact generation: do not mix specifications from older or newer versions with the item being purchased.
Reader compatibility: the offload reader supports the same card format and generation.
Camera test: format the card in camera, record the planned settings, play back the clip, and test the backup path before paid work.
Bottom line
For the Sony FX30, SD is not automatically the budget compromise and CFexpress Type A is not automatically the premium answer. The right choice is the card that satisfies Sony's requirement for the exact mode you will use.
Start with the settings table. Move to CFexpress Type A when the chosen mode requires it or when the Type A workflow offers a benefit you actually need. If a qualified SD card already covers the job, keeping it can be the smarter purchase decision.
Building out the audio side of the same camera? Read the DJI Mic 2 Camera Adapter guide for the Sony FX30.
If you need the camera, audio, lighting, and deliverables planned as one production system, plan a video project with SwoleNerd Productions.
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