With the file extension PSF so-called proof setting files of the image editing software Adobe Photoshop are marked. Proof profile files give you a preview of what the image will look like before you print a picture in a print shop.
In PSF files in addition to the output device and various information such as paper simulations are stored. To load a PSF file go to 'View-> Proof Setup-> Own Proof' in the proof manager. Photoshop supplies a large number of proof files for various professional makers (eg ARRIFlex, Epson).
The default storage location for PSF files is:
'~ Application DataAdobeColorProofing' (Windows)
'~ / Library / Application Support / Adobe / Color / Proofing' (Mac OSX)