From a list Google Drive Preferences , Locate Google Drive , and you have two options to choose from - Stream Files and Matched Files.
After syncing, the files on your computer match the files in the cloud.
Uncheck the screenshot checkbox to keep screenshots from being uploaded to Google Photos.
After you copy all the files you want to your G: Drive and they have finished transferring, you can then delete the files from your computer.
It could take between 1-5 days for your comment to show up.
Or, conversely, go through similar steps and then select a file to upload it.