What is application/vnd.adobe.photoshop file format?
I am working on a file in Photoshop but I do not know which kind of format the file is. It is the first time I see 'application/vnd.adobe.photoshop' under File->File Info...->Descripton
The information on internet is not clear about it.
It seems it's a file created in photoshop, most likely
I would try using open as and trying out diffrent programs if it won't open in photoshop. You could also try using a converter if you don't have anything to open it.