If you receive HRESULT: 0x80040E14 when trying to add an item like announcements/webpart/saving documents before running going through the Microsoft steps you have need to check the following
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Your SQL server data drive is not full
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Your mdf and ldf database files havent reached there full allocated size
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Your database files are set to increase when full.
If you are still having this issue after checking the above follow the step listed in this link