Yes, the Kingston Canvas Go! Plus microSDXC 128GB is compatible with the Sony FX30.
Sony FX30 has a full-size SD card slot. Kingston Canvas Go! Plus microSDXC 128GB (real write speed 90 MB/s, V30 class) fits via the bundled microSD-to-SD adapter and clears the camera's standard recording modes, but does not meet the Video Speed Class 60 floor this camera's higher-bitrate 4K modes require.
Limitation
Cannot record the higher-bitrate XAVC HS/S 4K modes (280 Mbps) -- requires Video Speed Class V60 per Sony's own spec, this card is V30. The bundled microSD adapter provides physical fit only; it does not change the card's class rating.
“aximum recordable bit rate Supported memory card XAVC HS 4K 280Mbps CFexpress Type A memory card (VPG200 or higher) SDXC V60 or higher *1 XAVC S 4K 280Mbps CFexpress Type A memory card (VPG200 or high”
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