Do I need to leave my Koofr app open when I am waiting for my files/folders to be uploaded on my Android device?
No, the Koofr app for Android can upload your files in the background, while you are doing other things.
Note: Running the initial upload of media files might take some time, depending on your network speed and the number of your media files. To make the initial backup run faster, we recommend you plug your phone in an outlet, connect it to a wi-fi network, and letting it do the backup in full.