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[Q] Backup firmware?

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planetj
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Default [Q] Backup firmware?

I have rooted my Tablet Z and unlocked the bootloader.
Before I mess around anymore, I figure it would be a good idea to get a backup of the firmware, to store on the sd-card, in case something goes wrong.
I just can't figure out what to do... The method I found so far, says the bootloader has to be locked, since it requires Sony Update Service.
Another method that I saw mentioned was using Flashtool to create a backup, but I can't seem to find that option. It also mentioned some files that I need to push, before backing up, I don't quite understand which files and what to do.
Can someone help me how to make a complete backup up of the system, that I can restore in case something goes wrong when I start flashing?
If possible I would prefer the system only, not all the apps that I installed, but if that's not possible, it's fine.
Thanks.
 
Felimenta97
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Install the Dual Recovery, and use TWRP to backup Cache, System and Boot (kernel) partitions. Choose SD Card as storage, and leave it there. Dont forget to not delete the folder called TWRP

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