There are two tools in the NextGIS Toolbox for Sentinel-2 imagery. The first one processes the imagery and uploads it to your Web GIS, the second one allows you to save the result on your PC. Both tools can trim images with a vector mask.
To work with the tools, you only need the image ID.
Use Copernicus to find the IDs. See the video on how to find the ID for an image and how to work with each tool.
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