Our web client makes it easy to browse, explore, upload files into your bucket but also downloads files, rename or delete them or just act as an S3 Filestash intends to be easy to use by everyone without training. Power users who need extra power can always use the complete AWS CLI to access. 1.6. Now we want to add a file to our bucket. Click "Upload" and choose a single file from your local machine by clicking "Add files," or just drag and drop the file here. 1.7. Once the file has been selected, click "Upload" to perform the actual upload. 1.8. Once the file is uploaded, log out of the source account. 1.9.