preview can't save

Hi there

I'm using the latest MBA with the latest up to date software. I opened a psd file in preview and wanted to save/export a copy as a jpg but for some reason I cannot. It says can't save as jpg. Also exported as a tiff and then tried to expoert it from tiff onto jpg but also denied it. Tried pdf too. I remember it being possible.

I tried on a differnt mac to export it and it somehow exported only parts of the file or i got a file that was simply with a white "picture".

File is not corrupted as I checked it many times. I could export it from photoshop but since i dont have the software on one of the macs i thought iuse this option as an alternative

Any ideas please?:confused::confused::confused: