Photo: Henry Söderlund, Wikimedia Commons, CC BY 2.0.
.jpg){kind=link}
Choosing a memory card for the Sony FX3 is more complicated than buying the fastest card you can find. The camera accepts both SD cards and CFexpress Type A cards in either slot, but the card required changes with the recording format, bitrate, frame rate, and whether proxy recording is enabled.
My current kit includes an Angelbird AV PRO CFexpress Type A 1TB card, SanDisk Extreme 512GB V30 cards, and SanDisk Extreme PRO V30 cards in 256GB and 64GB capacities. They do not all serve the same purpose. Here is the simple way I separate their roles.
The Short Answer
- V30 SD cards: useful for supported lower-bitrate recording, including supported settings at 200 Mbps; check the exact mode.
- V60 SD cards: the practical minimum for many XAVC HS 4K and XAVC S 4K settings above that range, up to 280 Mbps according to Sony's compatibility table.
- V90 SD cards: required for XAVC S-I 4K and XAVC S-I HD recording when using SD media, as well as some high-frame-rate S&Q settings.
- CFexpress Type A with VPG200 or higher: the most flexible option and required for the FX3's highest-data-rate 4K slow-motion setting.
The label on the card matters. Capacity such as 256GB or 1TB tells you how much it stores; V30, V60, V90, or VPG200 tells you more about whether it can sustain the required recording speed.
When a V30 SD Card Is Enough
Sony states that an SDXC card rated U3/V30 can be used when the recording bitrate is 200 Mbps. This makes V30 cards useful for a number of everyday recording settings, depending on the exact format selected in the camera.
That does not mean every SanDisk V30 card is suitable for every FX3 mode. Before a shoot, compare the selected file format, record setting and frame rate with Sony's media table. If the planned mode requires a faster card class, a successful recording in a different lower-bitrate mode does not establish compatibility.
My SanDisk V30 cards are therefore best treated as mode-specific media, overflow cards, or cards for compatible lower-bitrate jobs—not as universal FX3 cards.
When V60 or V90 Makes Sense
For XAVC HS 4K and XAVC S 4K at bitrates up to 280 Mbps, Sony lists SDXC V60 or faster media. Some 120p/100p S&Q combinations require V90 even when other settings in the same format work with V60.
When recording XAVC S-I 4K at up to 600 Mbps or XAVC S-I HD at up to 222 Mbps, Sony specifies SDXC V90 or faster if an SD card is used. V90 is therefore the safer SD-card category for creators who regularly move among All-Intra and high-frame-rate settings and want fewer card changes.
Even then, the exact mode should be checked. A speed class is a minimum performance category, not a guarantee that every card will support every camera function.
When CFexpress Type A Is Necessary
CFexpress Type A becomes essential for the most demanding FX3 setting in Sony's table: XAVC S-I 4K slow-motion recording at 1200 Mbps. Sony specifies a CFexpress Type A card rated VPG200 or higher for that mode.
A suitably rated Type A card can also cover many less demanding modes. My inventory includes an Angelbird AV PRO CFexpress Type A 1TB, but capacity and brand alone do not establish its VPG rating or certify it for every FX3 mode. The tradeoffs are cost and the need for a compatible reader. Also note that the FX3 uses CFexpress Type A, not the physically larger Type B format.
Do Not Forget Proxy Recording and Dual Slots
Proxy recording can raise the media requirement, so a card that supports the main recording setting alone may not be enough once proxies are enabled. Check the camera's warning messages and Sony's current help guide whenever the setup changes.
Both FX3 slots accept supported SD or CFexpress Type A media. Dual-slot recording can provide redundancy in compatible modes, but the cards still need to meet the recording requirement. Two slow cards do not become one fast card.
Match the Card to the Recording Setting
Read the selected record setting before shopping. This quick reference is based on Sony's published media requirements; it is not a benchmark of the cards in my kit.
| Recording choice | Media checkpoint |
|---|---|
| Supported 200 Mbps movie setting | Sony permits SDXC U3/V30; recheck with proxies enabled. |
| XAVC HS / XAVC S 4K, up to 280 Mbps | SDXC V60 or CFexpress Type A VPG200+. |
| XAVC S-I 4K, up to 600 Mbps | SDXC V90 or CFexpress Type A VPG200+. |
| 4K S&Q at 120/100 fps | HS/S may need V90; S-I slow motion requires Type A VPG200+. |
Normal Movie and S&Q are different cases. Frame rate alone is not a card specification. Check firmware, format, bitrate and proxy settings together in the FX3 Ver.2-or-later Help Guide, “Memory cards that can be used”.
How Much Recording Time Fits on 256GB, 512GB or 1TB?
The estimates below use nominal decimal capacity and the selected video bitrate. They do not establish whether a card is fast enough for that mode.
| Video bitrate | 256GB | 512GB | 1TB |
|---|---|---|---|
| 100 Mbps | 341 min | 683 min | 1,333 min |
| 200 Mbps | 171 min | 341 min | 667 min |
| 280 Mbps | 122 min | 244 min | 476 min |
| 600 Mbps | 57 min | 114 min | 222 min |
Calculation: minutes ≈ capacity in GB × 8,000 ÷ video Mbps ÷ 60. One TB is treated as 1,000GB; figures are rounded to the nearest minute. These are planning estimates, not measured camera runtimes. Formatting, audio, metadata, proxies and variable bitrate change the result. Leave spare capacity and use the camera's remaining-time display for the actual setup. S&Q capture and playback durations also differ; this simple table is not an S&Q runtime calculator.
Where the Cards in My Kit Fit
The SanDisk Extreme 512GB V30 cards offer more capacity than my Extreme PRO 256GB and 64GB V30 cards, but the Extreme PRO name does not make a V30 card a V90 card. All need a compatible recording setting. Before assigning the Angelbird AV PRO Type A 1TB to a mode requiring VPG200, verify the exact card's rating rather than inferring it from the brand or capacity.
For simultaneous recording, each card must support the mode and hold a copy. A 256GB card paired with a 512GB card does not create a 768GB duplicate recording: once the smaller card is full, two-copy coverage cannot continue without intervention. Read the simultaneous versus relay guide before choosing the second card.
Use Your Own Bitrate and Duration
The recording-time and storage calculator lets you include a proxy bitrate, a capacity reserve and independent destination copies. It estimates capacity, not recording-mode compatibility. Once a card is assigned, use the card ID and offload-status log to keep recorded originals separate from released media.
My Practical Card Plan
For a predictable shoot, I would organize this kit as follows:
- Assign the Angelbird Type A card only after checking its exact model and rating against the selected mode; verify VPG200 or higher when Sony requires it.
- Use the SanDisk V30 cards only after confirming the exact chosen setting is supported.
- Label and format cards in the FX3 before the job, after verified backups exist.
- Avoid changing recording formats mid-shoot without rechecking the card requirement.
- Copy the complete card structure to two verified destinations before erasing the original.
Final Take
The best FX3 card is determined by the recording mode, not by brand or capacity alone. V30 can be perfectly appropriate in a supported lower-bitrate setting, V60 covers many common 4K modes, V90 is needed for several All-Intra and high-frame-rate options, and CFexpress Type A VPG200 is required when the camera is pushed to its most demanding slow-motion setting.
Before buying or recording, compare your exact settings with Sony's current FX3 memory-card compatibility guide.
Affiliate disclosure: This article contains Amazon affiliate links. If you make a qualifying purchase, I may earn a commission at no additional cost to you. As an Amazon Associate I earn from qualifying purchases.
- Check Angelbird AV PRO CFexpress Type A cards on Amazon (affiliate link)
- Check SanDisk Extreme PRO V30 SDXC cards on Amazon (affiliate link)
Continue Your FX3 Recording Setup
After choosing a card, connect the media requirements to the rest of your recording workflow:
- XAVC HS vs XAVC S vs XAVC S-I: compare recording formats before checking the required card speed.
- Simultaneous vs relay dual-slot recording: decide whether the second card should duplicate the take or extend recording time.
- FX3 proxy recording workflow: plan smaller editing files while keeping the camera originals.
After recording, follow the FX3 card-to-SSD backup and archive workflow before formatting your media.
Continue Reading
Use these related guides for the next step in the workflow: