Amaya was actually quite technologically advanced, her eye giving a live feed that recorded everything it saw, including audio, each file stored under only a series of numbers and letters. There was even video and audio feed from when she had lost consciousness, shaking one of Sasuke’s own men administering the drug that suppressed her Deviant powers.
One of the oldest files had to have been when she was just being programmed, or the eye had just been installed, it was an older man wrapped heavily in bandages, speaking with someone out of view of the camera. The older man was scolding someone for bringing him the body in such terrible condition, and how it would take much more work than anticipated as a result.