Follow the below steps to change the network settings:
Open Total Drive
Open Total Drive on your device.
Open Menu
Tap the Three Lines Menu at the top left to open the menu.
Tap Configuration
Tap Configuration
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Tap Settings
Tap Settings
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Wi-Fi Only - pictures, videos, music tracks and documents are transferred only under Wi-Fi coverage.
Wi-Fi or Cellular - to allow files over 30mb to use cellular you can toggle the Upload large items checkbox.
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When Wi-Fi only is enabled, thumbnails and information on files may still be downloaded.
You can also toggle whether Total Drive will connect while roaming, by using the toggle below the Network/Wifi settings.
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