Technically, you CAN create full Nandroid backup without rooting the device. You just need to flash CWM (or, any recovery which supports Nandroid backup) over USB. For example, you can use Odin (Windows) to flash CWM to Samsung devices after going to download mode, all without touching the Android.
First is a link that explains Android partitions : partitions. Second is a SO answer, that explains Android's memory: memory. Now my understanding so far is this : Android has RAM and ROM. ROM is divided into several partitions, namely, /system, /data, /boot, /recovery, /cache, /misc and /sdcard. Now the link relating to sideload states that
Power off your device and boot it to Download Mode. Now long-press the Volume Up button to enter the Device unlock mode. Finally hit the Power Up button to confirm your decision. Doing so will wipe all the data on your device and then unlock your device’s bootloader. That’s it. You have completed the first step to root your Samsung Galaxy S10e.
Miscellaneous Android Development. 11 minutes ago. Accessories. 11 minutes ago. Google Pixel 8 Pro. I've been trying for like hours to unpack and repack a boot.img. I never made this before, I was reading much (actually too much) on the internet on how
Power off your Mi A2/A2 Lite completely. Boot your phone into Fastboot Mode by pressing and holding the Volume Down and Power buttons together. Connect your phone to the PC using the USB cable once it is in Fastboot Mode. Enter the following code to flash the patched boot image and root Xiaomi Mi A2/A2 Lite using Magisk.
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backup boot img without root
