Where does Showbox save downloaded files/movies?
On Android devices Showbox by default will save them in your download folder. You need to use the file manager on your phone, go to the device folders and then you will see a folder named Showbox.
There is also the option and possibility to save the files you stream and download directly to an SD card you may have on your phone.
Downloading movies/files to your SD card.
Download the Advanced Download Manager (https://com-ir-adm-pro.en.aptoide.com/) from Aptoide.
Go to the menu of Advanced Download Manager.
Click on Downloads or Downloading.
Where it says folders for files.
Input your SD card location.