Problem with backup unreal project

Try to “Fix Up Redirectors in Folder” in Content Browser.

Hi, I copied my unreal project to a Hard Drive. Just need to open space on my computert for new projects.
I copied the whole project folder: Config; Content; Derived Cache Data; Intermediate; Saveds + the Unreal Engine Project File.

I opned the project and everything seems fine: assets, sequences, etc, BUT…

when I try to save it, it freezes on 54%

So I opned the old file, on my laptop, made a minor modification and saved it…and it worked.

So, My question is: why isn’t the file I copied to my harddrive working properly? Any problem in the way I backed it up?

Thanks a lot