Manually Upload CSV Files

I can’t seem to locate where the .csv files are held – is there a way for me to manually upload the csv files using Filezilla?

I want to use a lot of charts, but I don’t want to upload each file individually one at a time (take too long), it would be better if I can just replace existing files with filezilla or another file manager all at once, but I can’t find the .csv files anywhere.

Thanks for the help!

https://wordpress.org/plugins/visualizer/