A:AnswerHi TripleR, Sony's commitment to customer satisfaction is our top priority. The A7R5 is not compatible with the CFExpress Type B listed here. However, the A7R5 is compatible with CFExpress Type A. Please follow the link below for a list of compatible Sony CFxA cards. Thank you so much for your question. And thank you for choosing Sony. - Pakorn (Sony Social Support)
https://support.d-imaging.sony.co.jp/www/cscs/accessories/compatibility.php?area=us&lang=en&mdl=ILCE-7RM5&cat=61
