File sizes are getting daft!

I saved out a .Tiff file last night as part of an action I'm doing in photoshop, I moved it this morning and it seemed a bit slow to move, so I checked the file size.   347mb, for one picture of a brides face!  Hells teeth, I've got about 1100 more pics to go, thats about half a hard dive full.    Time for a rethink on the action.