Image import massively via CMS

Hi team!

I was wondering if someone got the same barrier as me. I am trying to upload an 3 image for each CMS item (row) using CSV file.
I have tried the following:
1- Massive upload via images but with that the name of the file changes and I cannot map it easily.
2- Create a link to Google drive, Github and Dropbox where it can bring the data. But I got this error: “Link to image is bronken and will not be imported”

Anyone can help me with that?