Desktop/Finder files mess.

Hello jsbsvb123,

Without knowing what steps were taken to move all of your files from within the Finder application, there's no simple way to undo that. You can organize those files and move back to where they belong by following the steps in this article: Organize files in folders on Mac - Apple Support. The article offers different ways to organize your files and this section explains how to move into specific folders:

"Move items into folders

1. On your Mac, click the Finder icon  in the Dock to open a Finder window.
2. Do any of the following:

• Put an item in a folder: Drag it to the folder.
• Put several items in a folder: Select the items, then drag one of the items to the folder. All selected items move to the folder.
• Put a window’s content in a folder: Move the pointer to the immediate left of the window title until an icon appears, then drag the icon to the folder.
• You can press and hold the Shift key to have the icon appear immediately when you move the pointer into the title area. You can also drag the beginning of the window title to the folder without waiting for the icon to appear.
• Keep an item in its original location and put a copy in a folder: Select the item, press and hold the Option key, then drag the item to the folder.
• Keep an item in its original location and put an alias for it in a new folder: Press and hold the Option and Command keys, then drag the item to the folder to create the alias.
• Make a copy of an item within the same folder: Select the item, then choose File > Duplicate or press Command-D.
• Copy files to a different disk: Drag the files to the disk.
• Move files to a different disk: Press and hold the Command key, then drag the files to the disk."

We hope this helps. Let us know if we can assist with anything else at all. Take care.