No, the Canon EOS R3 is not compatible with the Nextorage NX-A2PRO 160GB CFexpress Type A.
Canon EOS R3 Slot 1 accepts only CFexpress Type B. Nextorage NX-A2Pro is CFexpress Type A — a physically different form factor that does not fit the R3's Type B slot.
What works instead
See all compatible camera for the Canon EOS R3 →“When recording movies, use a CFexpress card that supports VPG400”
Last verified:
Confidence: inferred