Yes, the Lexar Professional 1667x 64GB SD is compatible with the Nikon Z fc.
Nikon Z fc uses UHS-I slot. Lexar 1667x UHS-II operates in UHS-I mode (~100 MB/s). Z fc 4K30 floor is 45 MB/s — passes.
“Nikon Z fc specifications: storage media is SD and UHS-I compliant SDHC and SDXC memory cards — UHS-II cards operate in backward-compatible UHS-I mode.”
Last verified:
Confidence: inferred