Yes, the Samsung PRO Plus 256GB SD works with the Sony FX3 — but only Records XAVC S HD and the 200 Mbps modes (the.
The Samsung PRO Plus is a UHS-I U3 (V30-class) card. The FX3 allows a U3/V30 card for XAVC S HD and 200 Mbps recording, so it is not incompatible, but its higher-bitrate 4K modes need V60/V90, which this card does not meet. Mirrors the already-correct staging row (created 2026-06-13) -- live had a stale zero-evidence "400 MB/s" version that predates this research.
Conditions for compatibility
Records XAVC S HD and the 200 Mbps modes (the FX3 explicitly allows a U3/V30 card at 200 Mbps). Cannot record the higher-bitrate XAVC S/S-I 4K modes, which require a V60 or V90 card.
“When the recording bit-rate is 200 Mbps, you can also record using an SDXC card (U3/V30)”
“UHS-I Speed Class 3 (U3) and Class 10 for 4K UHD and FHD video”
Last verified:
Confidence: inferred