Upload file to google sites

[Q] 如何上傳檔案到自己的google site?
[Q] How to upload file to my own google site?

[try]
0. Log on google sites https://sites.google.com/  by gmail account

1. Select or create the site where you want to upload file

2. On the top right next to "Edit Page" is the "More actions"
click to choose "Manage site" (page should refresh to show sth. new)

3. Click  "Attachments" in the left side menu under "Site content"
(page should refresh to show sth. new)


4. Click "Upload" ...