Photoshop - application of sharpening without duplicating background layer

[tbm]

When applying USM in photoshop I like to apply it to a copy of the background layer so I still have the unsharpened original. I've noticed however that this increases the file size considerably; is it possible to apply another (non-background) layer for the purpose of sharpening?

Cheers

 

[Kerioak]

You can always delete the original background (which I assume is a copy of the saved original file) or flatten the image once you have it as you want it

 

[tbm]

Thanks - this is the issue though, I want to keep the original background and layers for ease of future editing..

 

[zilly]

smart filters?

 

[fletch5]

save as option? keep the unsharpened file seperate to the sharpened one:shrug:

 

[Kerioak]

I would keep the original file totally separate and unchanged and only work on a copy then if you do a mistake you can always make another copy from the original file. This does double up on file size but can be invaluable if it is an important file.