File Size

Hi,

I have a one Solidworks weldment model File and having about 9560 KB in size. So when I save as that same file with or without a different name (without any singel change) in a different location or in the same location with different file names the file size is getting reduced to 4749 KB. but when I just copy and paste the same the file size is still the same 9560.

I am curious why this is happening since it is same file but created maybe 1 month ago and now if I'll do save as the file size is getting reduced.

Looking forward to your response.

Thank you,

Parth 

SolidworksParts And Features