I have folders of images that I would like to archive into back up drives and using winrar or a similar tool I would like to compress the files. They are (mostly - 99%) jpeg files.
In one archive I have 54 files at 114MB, when I use win rar, best compression method and check the "create solid archive" and the "lock archive" boxes I get a final size of 104MB, which is a compression of about 9%.
Is there a way to get even better compression using Winrar or another tool with tweaking setting etc to get a smaller archive?
Or is it the case that that is about the maximum compression I expect from such a task?
Note: I do not want to lose any more quality in the already compressed JPEG images so lossy compression is out of the question.