sony a7r iii memory card slots: Sony Alpha A7R V vs A7R IV | Amateur Photographer. Best Memory Cards for Sony a7 III, a7R III & a9 Cameras. Tested in Camera: The Best Sony A7R V Memory Cards - Alpha Shooters.
This article lists 10 key comparisons between the Sony A7R IV and the Sony A7R V which were launched 39 months apart.
The Sony a7R IV takes two memory cards (both are UHS-II
slots), and you can format each one independently.
Sony has released a new version of their flagship full-frame mirrorless camera: the Sony a7R IV. After having been shooting with it quite a bit, here's my take.