What is a file?
A file is any type of asset that isn't a web page. Things like images, Word documents, PDFs, and Excel spreadsheets are all files.
Uploading a Single File
Step 1: In the left navigation pane, select a folder where the files will be uploaded.
Step 2: From the top menu, click New >> Default >> File.
Step 3: Click the Choose File button or drag and drop a file into the dotted area.
Step 4: The System Name will automatically be filled in to match the filename of the file uploaded. It can be changed here if necessary.
Step 5: To add alt-text to images and other information about the files that are being added, click on the Metadata tab.
Step 6: In the Summary field, insert a brief summary of the file you are adding. If uploading an image, this should be what the alt-text field should read.