To know how to upload the Files directly through file manager please follow the below steps:
1: Open the Cpanel with the login details you have received on your registered mail,then click on File manager under FILE section.
2: You will see the option UPLOAD on top of the file manager menu bar.
3: Once you click on it, you will get a option to select the file from your local system for uploading on the server.OR if you wanna Upload the Multiple Files then Choose Files one by one and Get it Upload
4: Once you select the file it will start uploading to the server once it will be uploaded 100% the uploading bar will turn from blue to green.