MP

[macos]

MP in the window to keep open the Add Program PS picture ,there are many temporary files , *.tmp

[xnview]

With Photoshop, you have these .tmp? Strange, XnView don't create tmp files...

[thibaud]

it's photoshop temp files, you should only have one and only while photoshop is running with that file opened.
multiple .tmp file might just indicate that you had photoshop crashing while editing that file and didn't clean up it's mess.