Upload an Object
Open the bucket you want to upload to, and on the File tab click Tải file lên (Upload file) (or Tạo thư mục (Create folder) first if you want an empty folder). Files are uploaded into whichever folder is currently open in the bucket.
The Upload dialog
Drag and drop a file/folder onto the Kéo thả files (Drag and drop files) area, or click Click vào đây để upload file (Click here to upload a file) to pick several files, or Click vào đây để upload folder (Click here to upload a folder) to pick a whole folder (its structure is preserved).
Selected files appear in a table with Tên (Name), Kích thước (Size), Loại (Type) — click the × on a row to drop that file from the list before uploading.
Click Xác nhận (Confirm) to start the upload, or Huỷ (Cancel) to close the dialog.
The upload dialog only lets you pick files — there's no separate field to set a prefix (the destination is whichever folder you currently have open), no dropdown to choose an access level, and no field to override the Content-Type. To set an object's access permission, do it after uploading, in Đặt quyền (Set permission) — see Manage Objects.