Data recovery

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I know data recovery companies exist out there but they want to charge 400-2000 to recover data and I just don't have that type of money. I do, however, have time and soldering experience so, I'm wondering if the iPad Mini(1) has some sort of flash(able) drive that I can wire an external sata cable to? If so, does anyone have a schematic or know where I can find one?

TIA