Hi, I always used to download mock up files and place my own design in the file for advertising purposes for example a T-shirt mock up or a billboard ect. I work on windows and have the latest version of Photoshop installed now. I realised a couple of months ago (even with a previous version of Photoshop) that the psd part of the mock up file was thrown out after I downloaded it. I tried a couple of mock ups and the files coudn't open up and had an error message. I tried opening old mock up files but most of them had the psd part of the file gone. The ones that had the psd part of the file could not open. Does anyone know the reason for this?