App to make byte 4 byte forensic image

[event2020]

Hi

I have a rooted Galaxy w and I am looking for a non commercial app that can make a byte for byte forensic dd image of the phone.

I want to do this so I can look for detailed SMS messages using winhex.

I wonder if anyone can suggest such an app but I'd prefer one that does not need complicated command line input as this just confuses the heck out of me.

Also, I have seen on various forensic sites reference is made to files named mtd0 through to mtd5 but when if have searched through
My galaxy w, these files are not on it anywhere?

I apologise if you are sick of this kind of question but any guidance or advice would be much appreciated.

Thanks in advance.