two different excel files on oneDrive

Hello,
I'm looking to put two different excel files on oneDrive.
In the first file there is digital information
In the second file there are dates, and I am trying to put a formula in this second file to retrieve the information of a specific cell from the first file.

This works very well on my local computer, because the formula will simply search my drive C: // ......
But in Onedrive which formula to put?