Upload new files by going to File manager and clicking on the + Upload New File in the upper right corner.
A pop-up window will appear where you can drag / drop or upload files from your device. Your new file will appear in File manager menu. Clicking on a specific file will automatically download the file to your device, except image files which you can preview in the application.
To download all files simply tick the box next to File title and click the highlighted cloud in the upper right corner.
You can easily filter files by format by clicking on checkboxes in the left menu.
You can also use filters to search by module or date upload.
There is also the option to use the search tool and search files for keywords.