1. Navigate to the desired SharePoint site homepage.
2. In the left-side navigation menu, select "Documents".
3. Navigate to the location where you want to upload the file.
8. In the upper menu, select "Upload". A drop-down menu will appear.
9. Select "Files".
10. Navigate Windows File Explorer to the location of the file you want to upload.
11. Double-click the desired file to upload it to the new folder.
NOTE: If uploading multiple files, you can select multiple in the File Explorer by CTRL-clicking each file, then selecting "Open".