I just wondering that is it possible to load local data files(like .xlsx or .csv files that on my google drive) into Colaboratory?
You can use this URL for uploading your files in Google Colab:
https://colab.research.google.com/notebooks/io.ipynb#scrollTo=vz-jH8T_Uk2c
go to Local file system>Downloading files to your local file system
Then run the code. After that, browser button will be appeared for you to uploading your files from your PC.