Hi @Ryan E. Kegerise ,
According to your description, the incident should be accidental.
Did you make any changes?
Are other sites and users also in this situation?
Generally speaking, the drag and drop feature works when any of following conditions are true:
- You use the latest version of Mozilla Firefox.
- You use the latest version of Google Chrome.
- You use the desktop version of Internet Explorer 10 or Internet Explorer 11.
- You use Internet Explorer 8 or Internet Explorer 9, and you have Microsoft Office 2013 or newer installed on your computer.
If you don’t know what settings have been modified and cannot find the cause of the problem, it is recommended that you use Sync files with the OneDrive sync client in Windows in Windows as a workaround.
For more information, please refer to:
- The "drag files here" option is missing for a list in SharePoint Online or SharePoint 2013 on-premises
- Information about dragging files into document libraries in SharePoint Server 2013 or SharePoint Online by using a web browser
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