I've soft-bricked my Samsung Galaxy A40FN running Android 9.0 Pie while attempting to disable bloatware via ADB and I'm currently searching for a solution to recover my data and get the system back running. The phone is stuck in a boot loop, but I can get into recovery mode and download mode.
FRP lock is off (no Google account registered on this device) and I didn't activate any encryption on my part.
I didn't try wiping/factory-resetting yet as I need to rescue my data first. One possible solution for this could be to flash the original firmware using Odin while leaving the
/data folder untouched:
Question: Does anyone have experience with retaining personal data during a firmware flash and know how to verify the authenticity of the files downloaded from unofficial sources such as SamFW?
I.e. does Samsung publish MD5 hashes of official firmware updates and would comparing these hashes/checksums be a reliable method to verify that the files have not been tampered with, considering that firmware files are typically 4-5 GB large?