How to permanently delete files from Google Drive on your Android device

You can easily delete files from Google Drive on an Android by sending files to and deleting them from your trash folder.

How to delete a notebook in OneNote on your computer and remove old or unwanted files

You can easily delete a notebook in OneNote when you no longer need it by accessing File Explorer and removing it there.
ZDNet

How to clear your iPhone cache (and why it makes such a big difference to performance)

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