To send files to us here at Simba Studios it's simple as 1,2,3.
On the top left side of your drive, there is a RED button that says "NEW", click that. When u click that a menu will appear. If you are trying to send a single file click File upload, if you're trying to send a group of file(s), you need to put all the files in a single folder on your hard drive, then click Folder upload, select folder. Wait for files to upload.......
If you need technical help with your google drive please visit the official Google Drive help page.