If files are used in older revisions they can´t be deleted.
But sometimes it´s wanted without the deletion of all revisions which could be much to do´s.

Besides it´s not shown on which nodes/entities the files are used.

For a UI improvement I guess it´s good to have an additional step which shows this and an additional question "Do you really want delete these/this file?".

This should be enought to avoid mistakes and improved the usability.
Also it could be possible to add a checkbox which deletes also older revisions of nodes where the files are used and a final report, maybe an export of these nodes/files due to backup reasons.

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Version: 7.9 » 7.x-dev

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