"data backup"?

Beyond error memory and crash recorders, there is little data toring in vehicle systems. What exactly do you have in mind?

After having seen another of your questions:

the usual means to record data are add-on data recorders usually incorporating a large hard disc.

I currently have no vendor or manufacturer in mind. Anyway, look at the pages of ETAS, vector and/or Softing (there are more "diagnostics tools" suppliers). Or try searching "automotive data recorder" at g..gl.

design and implement data logging of sensors that generate safety in a car.

Sensors do not generate the safety - they merely contribute to that.

The generation of safety (if you want to use this expression) is up to the ECUs (Electronic Control Units).

Exact

it's about designing a system that extracts that information to process in real time or outside of this ...

i think that you don't need data backups, data backups can't give real time plotting i think that you must need some RF signal from the sensor so that the signal can be send from the sensor front to the monitoring system so that you can process the signal. Now a days we advanced with Wireless Sensor Network so you can make an embedded system such that it can send data from vehicles and also you can back up data and real time processing.