Change compression level ?

[chmichael]

The compression level needs to be maintained within a task as all images in that image chain must use the same compression.

What's the problem having different compression on the new images after i change it ?

Warning: if you don't have a really high-end CPU, the HIGH setting will eat your processor up in spades.

Well it's backing up at mid-night non office hours so it will not be a problem.