Android’s system, data and cache images
When the Android platform is compiled, it generally creates .img files for system, data and cache.
It happens that in the phone these images are not directly downloaded directly, but the phone flash memories are formatted in different kind of file system i.e YAFFFS, RFS, XSR. It seems RFS, XSR are proprietary file systems, but there is TinyBML which is open source and present in Boot loader as well in the Kernel.
So these .img images must be converted to the compatible file system format and then it should be downloaded.
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