Hey. For the pi 4 it's recommended a 5v 3 A power supply

For the saving location problems: did you modify the settings in the indi control panel? You need to save the configuration also. You can save the images on the sd card and raspberry or on the raspberry alone. I recommend you to shoot in fits format and not raw. The benefits are: image is shown right after capture, you can load a fits file and slew to target (perfect when shooting for multiples nights on a target), target coordinates are written in the fits file, pixel size etc (perfect for editing software like pixinsight)

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