Unable to open file - "File" is used by osx and can't be opened

How would I apply this to all files in subdirectories of a folder?

I have a folder I'm syncing my photos to NAS with, containing folders for each day. The image files are what keeps having this issue, so it would be helpful if I could cover all of them at once.

Please back up all data before proceeding.

Select the text on the line below by dragging across it. Don't include the blank space at the end of the line. Only the text should be highlighted.

xattr -d com.apple.FinderInfo

Copy the selected text to the Clipboard by pressing the key combination command-C.

Launch the Terminal application in any one of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad and start typing the name.

Paste into the Terminal window by pressing command-V, then press the space bar.

Now switch to the Finder and and select the item(s) in question. Drag into the Terminal window. More text will be added to what you entered.

Click in the Terminal window to activate it, then press return.

Wait for a new line ending in a dollar sign ($) to appear. You can then quit Terminal. Test.

Thanks a lot.

Followed instructions to a T! Worked perfectly on Mac Sierra! Thanks for the very descriptive instructions....

Hi,

I'm getting this error when I try to open some mp4 files. And the files appear 0 mb.

please help