The Nikon Z7 is the first mirrorless full-frame camera from Nikon and was initially released in 2018. The Z7 shares a 45MP sensor and 4K video support with the heavier and larger Nikon D850 (DSLR) and adding the faster EXPEED 6 image processor.
Unfortunately, the Nikon Z7 offer just one card slot – for memory cards being as fast as they're expensive: XQD 2.0. While the fastest XQD cards are priced similar to high-end SD (UHS-II) and CompactFlash cards, midrange XQD cards are at least twice as expensive as value for money SD cards (UHS-I).
Important note: Firmware version 2.2 or higher is required to support CFexpress memory cards in the Nikon Z6's XQD card slot. Firmware updates on cameras with firmware 2.1 or earlier can only be performed with XQD memory cards.