Yes, the Nextorage NX-A2PRO 160GB CFexpress Type A is compatible with the Sony FX3.
Nextorage NX-A2PRO 160GB CFexpress Type A is VPG800 class. Meets the floor for: 4K30 (200 MB/s floor); 4K60 (200 MB/s floor); 4K120 (200 MB/s floor). (Peak write 1900 MB/s is not evidence of sustained performance; the VPG800 class rating above decides this.)
“XAVC S 4K 280Mbps CFexpress Type A memory card (VPG200 or higher) SDXC V60 or higher”
“CFexpress™4.0 Type A MemoryCard VPG800 VPG400”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)