How to import csv from local computer on cloud basic plan?

I am trying to import a csv file (filename is import test.csv) from local computer (Windows 10), because I want to make graphics out of 3D data using “Plot3D”.

I use mathematica on Wolfram Cloud Basic plan. So I cannot use “Upload File(s)” in the image.

Import["G:\\import test.csv"]

Error Message is “Import: File G:\import test.csv not found during Import”.

Why the command is not working? How should I give a Path?