In windows you can use a software like Win32DiskImager that create an image file of your SD card and then you can write it on another SD.
Take care that NEW SD must be the same o greather than the original sd, due to the space of the image.
On raspbianos there is present a tool named SD card copier (or similar) that can copy running SD card on another connected via USB.
In this case I do not think the sd size must mach

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just clone the SD CARD from the good machine to other one
I use Lexar 633x cards or samsung evo u3

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RClone could be  a solution that sync a local folder with a service like OneDrive GDrive ecc.
I prefer share a folder via Windows share between a raspberry and my windows desktop, the same folder are also shared via FTP that is more reliable than windows share and better for a large volume of files

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Ok with the Simulator, but not ok if you use a DMK 21AU618.
This occours on two different systems equipped wth this kind of camera.
A workaround could be to complete the procedure with Ekos, and then create externally the master darks and replace those bad build by Ekos, but it is not a great solution

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Here you can find the single fits and the master dark obtained

we.tl/t-Xlbs79sLRK

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I confirm you that single frames are good. The problem is present only in the MASTER DARK.
No problem of any kind if i use the QHY83M to do the same procedure

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So let me make other test before give you a definitive response regard of this issue

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The problem is also present in KStars 3.5.4

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I do not know why, but this is a workaround.
This happens sometimes. It seems that images value, like width/height or others, are bad calculated and PlateSolve goes crazy

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in the Options disable Use scale.... and Update position ad try to solve again

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ALESSANDRO PENSATO replied to the topic 'iOptron iPolar scope' in the forum. 2 weeks ago

You obtain 3 images but on rotated basically on two same axis RA and DEC, because it is linked to the mount itself.
instead i use my main camera connected to the telescope and use PPA procedure, in this case you have a movement that is suitable for a better calculation of the PA

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ALESSANDRO PENSATO replied to the topic 'iOptron iPolar scope' in the forum. 2 weeks ago

I used the CEM70 for the first time few days ago, and before i used the EQ6.
When you run the PPA it suggest a movement to WEST of 30degrees and it move 2times and take 3pictures to calculate the polar deviation.
If you use the iPolar, you dont use the movement of 30+30degrees, but probably you have at the end a movement of few degree.
Greatest is the movement more precise should be the calculate of the polar deviation. 
This is just my opinion

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