No, the Lexar Professional CFexpress Type A Gold 256GB is not compatible with the Nikon Z9.
Nikon Z9 accepts only CFexpress Type B and XQD cards in both slots — there is no SD slot and no Type A slot. Lexar Professional CFexpress Type A Gold uses a physically different connector that cannot be inserted into either Z9 slot.
What works instead
See all compatible memory card for the Lexar Professional CFexpress Type A Gold 256GB →“The camera can be used with CFexpress (Type B) and XQD”
Last verified:
Confidence: inferred