Massive value storage

Hello. I'm working on a project in school, and I need a solution to stock very much values to make a graphic with them then display it on a HTML page.

I don't very know how to, so if someone have a tip, that would help me a lot.
Already thank you all for ur future answers and help. :slight_smile: :slight_smile:

How much is very much?
What project?
Do you have any code, schematics, processes, or anything to work off of to give you the most accurate answer?

We need more information...

Which Arduino board are you using ?