The Wyze spec is 32 GB, however many people are using larger cards. Personally all of my cameras are using 64GB cards. Likely the more important part is to use good quality cards that are designed for video operation. This is the card I’m using:
https://www.amazon.com/gp/product/B00V5Q1N1I/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
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