Hi,
how much space do I need on a SD card for a timelapse of 3 Months 1 picture/minute?
-Daniel
Welcome to the Wyze User Community Forum @dan94! 
Wyze Cam Timelapse Video is compiled at 30fps (frames per second).
Each 30 frame second of video is downloaded in the resulting MP4 file with a file size of approximately 3.4MB per second.
Your timelapse, however, cannot be more than a month in duration as this is the outer limit of the V3’s Timelapse scheduling capability.
A one month (30 day) timelapse with a 1 minute interval would result in 43,200 frames, or approximately 24 minutes of video.
24 minutes of video will take approximately 4.9GB.