Yes, the Sony A7 IV is compatible with the Sony SF-G Tough 128GB.
Sony SF-G Tough writes at 299 MB/s (V90 rated). Sony A7 IV requires 200 MB/s minimum for XAVC S-I 4K30. 299 MB/s clears the threshold with margin.
“Sony A7 IV Help Guide: XAVC S-I 4K at 600Mbps requires SDXC V90 or higher; XAVC HS 4K at 200Mbps requires SDHC/SDXC U3/V30 or higher — V90 SD card meets all SD-slot recording requirements.”
“Class 3 (UHS Speed Class), V90 (Video Speed Class)”
Last verified:
Confidence: inferred