If you don't feel like manually deleting empty folders, use this PowerShell script to query and delete all empty folders and subfolders. Make sure you change the $WebURL to your SharePoint site or subsite, and the $listName to your library.
Library
Update List/Library Columns With External Content Type Columns
Scenario: You have a column on a custom list or library that needs to be back-filled with data from an External Content Type (ECT). Solution: Create a list from the ECT and use PowerShell to update your custom list's column with the ECT's list column. Creating a list (assuming you already connected an ECT): Open SharePoint Designer 2013 … Continue reading Update List/Library Columns With External Content Type Columns
Update All List Items Using PowerShell
Scenario: You added a new column and need to update that column for every item in a list or library. Solution: Here is an example PowerShell script that can be used to update one or more columns for every single item in a list. Remember: change $WebURL to the URL of the site or subsite … Continue reading Update All List Items Using PowerShell
SharePoint Mustard 