Transfer measurement data from sensor and camera to external memory

Community help with my project
#1

Greetings.
For my project I need to connect an external sensor (any), 2 cameras and a measuring device. The data should be sampled at a rate of 20 per second.
To do this I need a lot of memory at least megabytes per sample. This means that total external memory is at least 30 gigabytes.
The data will be transferable to the computer via USB cable only at the end of all samples.

#2

Which type of camera are you planning to use ?

Arduino can be a bit weak for working with cameras, however you can connect 2 webcams and external sensor to a Raspberry Pi and use a high capacity SD card (32GB or more).

Cheers,

Maayan