The file extension .003 (specifically part of a HAY.7z.001 , HAY.7z.002 , HAY.7z.003 sequence) indicates that you have the third part of a .
You will need software capable of handling split 7z archives.
in the sequence (the one ending in .001 ). Right-click HAY.7z.001 . Select 7-Zip > Extract Here (or your app's equivalent).
Do you have all the other ( .001 , .002 , etc.) in that same folder yet?