Complex issues - bad format or not readable adobe after effects and photoshop

Hi guys,

I am facing a designer's nightmare recently...

My company backed up the server during Christmas and then everything of my computer started going wrong.

The AE files I was working on smoothly suddenly become unable to open.

It would pop up a message of "bad format or not readable".

Meanwhile If I open the Photoshop files and make changes, I am not allowed to save it. (The message said something like I don't have the right to do so.)

I tried to use "Save As" function to create another file, then the original PS file would be unable to open. (And obviously these PS files would become all error in AE too)

On the other hand..I tried to export something on Premier Pro and the exported files would lost part of the tracks.

I have no idea what's going on but before my boss back up the server It's all fine.

He helped me to reinstall the computer.

It seems ok but the bad format or not readable AE issues still happening.

Now I am really struggling and scared to do the works as the AE files keep being disable randomly.

May I know what should I do?