To upload files to Educloud share, you can simply drag and drop the files from your computer to the location where you want them.
You can also click on the plus sign at the top left to bring up the option to upload files.
To download files in Educloud share, you can click on the three dots found next to the share button. This will provide you with options such as downloading the file.
Here you also have the option to choose "Edit locally" if you want to continue working on the file in the desktop app.