Strange file on my usb key

[oirishman]

Hi i searched for a forum about file extensions to try and open a strange file i found on my usb key.
i cant write the extension but i included an image of the properties.I am running win 8

http://i.imgur.com/d9aKipD.png

[michelin]

I think it is a some sort of backup or temporary data created by unknown software.